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GMC Yukon XL 2000–2006

GMC Yukon XLModel years 2000–2006

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2 conditions added

Common on this vehicle:Warning lightLeakNoiseOverheatingStalls or shuts offVibration or shudder

Record by record

45 records state a cause or a remedy. Each record is shown as short labels in the order fault → finding the cause → correction. Press a label to narrow to the records that state it.

Symptom

Component named as the cause

Work done

How it is said to have ended

  • result not stated1

A ribbon is as wide as the records that state both of its ends (only the commonest are drawn). A record that names several symptoms or components runs through each. Orange is records that say the fault came back or was not fixed. Results come from owners’ reports only; one that does not say is “result not stated”. None of this is a likelihood of a cause or a rate at which work succeeds.

Read the records one by one (30)

Known issuesSingle-cylinder misfire (P0300-P0308) and/or chirp, squeak or tick at camshaft speed: worn cam lobe / lifter, valve or valve spring2

  1. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Engine Misfire and Service Engine Soon Lamp Information

    1. 1Fault

      • With the SES light on, a P0300-P0308 DTC is found with misfires counting on a single cylinder, which may or may not be felt.
      • The noise may be described as a chirp, squeak, squeal or tick and may increase off of idle.

    2. 2Finding the cause

      Possible causes

      • A worn cam lobe on this engine family generally makes a consistent chirp, squeak, squeal or tick at camshaft speed and/or a misfire with a P0300-P0308 DTC.

      Steps to confirm (in the document’s order)

      1. Press on the rocker arms with a wooden hammer handle while the noise is present; if pressing the valve side of a rocker changes the noise, a lifter and/or cam lobe concern on that cylinder is most likely.
      2. Measure cam lobe lift at the push rod side of the rocker arm; it will differ from the SI specification but should be similar to the other rockers on the same bank.
      3. A bore scope or pen light may help when inspecting the cam lobes through the lifter bores.
      4. A good sign of a sticking valve is that misfires keep counting during an aggressive deceleration with engine braking.
      5. The Cylinder Leakage Test in SI should typically isolate valve leakage by showing excessive leakage past an intake or exhaust valve compared with the others.
      1 more points

    3. 3Correction

      Repair

      1. If a worn cam lobe or lifter roller is found, replace the camshaft and all lifters per SI, plus the plastic lifter guide for the affected lifter (for the 2010 model year, all the plastic lifter guides).
      2. If force is needed to tap the valve off its seat, there is excessive carbon build up, which may be repaired by decarboning the engine.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 1999-2013 GMC Savana, Sierra and Yukon (with a V8 engine per the model list) (note: the Yukon years run later than the years this service covers).
    • Condition：With the SES light on, a P0300-P0308 DTC is found with misfires counting on a single cylinder, which may or may not be felt.
    • Condition：The noise may be described as a chirp, squeak, squeal or tick and may increase off of idle.
    • Cause：A worn cam lobe on this engine family generally makes a consistent chirp, squeak, squeal or tick at camshaft speed and/or a misfire with a P0300-P0308 DTC.
    • Confirm：Press on the rocker arms with a wooden hammer handle while the noise is present; if pressing the valve side of a rocker changes the noise, a lifter and/or cam lobe concern on that cylinder is most likely.
    • Confirm：Measure cam lobe lift at the push rod side of the rocker arm; it will differ from the SI specification but should be similar to the other rockers on the same bank.
    • Confirm：A bore scope or pen light may help when inspecting the cam lobes through the lifter bores.
    • Repair：If a worn cam lobe or lifter roller is found, replace the camshaft and all lifters per SI, plus the plastic lifter guide for the affected lifter (for the 2010 model year, all the plastic lifter guides).
    • Confirm：A good sign of a sticking valve is that misfires keep counting during an aggressive deceleration with engine braking.
    • Repair：If force is needed to tap the valve off its seat, there is excessive carbon build up, which may be repaired by decarboning the engine.
    • Confirm：The Cylinder Leakage Test in SI should typically isolate valve leakage by showing excessive leakage past an intake or exhaust valve compared with the others.
    • Confirm：The two pieces of a broken valve spring can stay stacked together and be hard to see, so lightly push on different places on the springs with a small hammer handle.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

  2. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Service Engine Soon Lamp and Engine Misfire Information

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

      What the documents say to do

      Single-cylinder misfire (P0300-P0308) and/or chirp, squeak or tick at camshaft speed: worn cam lobe / lifter, valve or valve spring

      Confirm

      • If pressing on the valve side of the rocker changes the noise, a lifter and/or cam lobe concern on that cylinder is most likely.

      Repair

      1. If a worn camshaft lobe or lifter roller is found, follow SI procedures to replace the camshaft and all lifters.
      2. Also replace the plastic lifter guide for the lifter that had the damaged cam lobe and/or lifter roller.

      Caution

      • A damaged cam lobe is easy to overlook when inspecting through the lifter bores; unworn lifter rollers do not mean the cam lobes are okay.
    Read the sentences of the record

    Open the manufacturer’s document (PDF) ↗ What is shown here is NHTSA’s summary; the procedure is in the document itself.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

Known issues4L60-E slip or no forward engagement right after input housing replacement (service part 17803687)1

  1. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Input Housing Inspection for Forward Range Slip

    1. 1Fault

      • A few transmissions may slip or have no engagement in any forward gear immediately after the Input Housing (621) is replaced.

    2. 2Finding the cause

      Possible causes

      • The Input Housing (621) from GM Service Parts may have an incorrectly drilled input shaft.

      Steps to confirm (in the document’s order)

      1. With the Input Housing (621) completely assembled, apply regulated compressed air to the 3-4 clutch feed hole and the forward clutch feed hole one at a time.
      2. Air should not leak out of the 3-4 clutch feed hole when air is applied to the forward clutch feed hole, and not out of the forward clutch feed hole when air is applied to the 3-4 clutch feed hole.

    3. 3Correction

      Repair

      • If air leaks between the two feed holes, replace the Input Housing (621) with one from GM Service Parts, ordering new housing part number 19125752.

      Part numbers printed in the document

      The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

      Parts

      • Part number 19125752, Input Housing And Turbine Shaft Assembly, quantity 1.

      Part numbers printed in the document

      The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

      Caution

      • This information only applies to Input Housing (621) with service part number 17803687; it does not apply to GM service transmission assemblies or original equipment transmission assemblies.
      • When testing a fully assembled housing, a small amount of air leaking between the input shaft and the housing does not indicate a defective part.
      • Do not replace an Input Housing (621) assembly solely because of a small air leak between the shaft and housing.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The model list includes the 1999-2006 GMC Savana, Sierra, Yukon and Yukon XL.
    • Applies to：It applies to vehicles equipped with the 4L60E, 4L65E or 4L70E automatic transmission (RPO M30, M32 or M70) and service input housing part number 17803687.
    • Caution：This information only applies to Input Housing (621) with service part number 17803687; it does not apply to GM service transmission assemblies or original equipment transmission assemblies.
    • Condition：A few transmissions may slip or have no engagement in any forward gear immediately after the Input Housing (621) is replaced.
    • Cause：The Input Housing (621) from GM Service Parts may have an incorrectly drilled input shaft.
    • Confirm：With the Input Housing (621) completely assembled, apply regulated compressed air to the 3-4 clutch feed hole and the forward clutch feed hole one at a time.
    • Confirm：Air should not leak out of the 3-4 clutch feed hole when air is applied to the forward clutch feed hole, and not out of the forward clutch feed hole when air is applied to the 3-4 clutch feed hole.
    • Repair：If air leaks between the two feed holes, replace the Input Housing (621) with one from GM Service Parts, ordering new housing part number 19125752.
    • Caution：When testing a fully assembled housing, a small amount of air leaking between the input shaft and the housing does not indicate a defective part.
    • Caution：Do not replace an Input Housing (621) assembly solely because of a small air leak between the shaft and housing.
    • Parts：Part number 19125752, Input Housing And Turbine Shaft Assembly, quantity 1.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that have slip in forward ranges immediately after replacing the input housing. Technician will inspect the 3-4 clutches and the forward clutch oil feed passages for leakage between circuits. Technician should apply regulated compressed air to the 3-4 clutch feed hole and the forward clutch feed hole one at a time with the input housing. Technician will need to replace the input housing if there is an air leak 3-4 clutches.

ELECTRICAL SYSTEM26

  1. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2024-08-26

    GM Vehicle Wide Programming (VWP) Software Update Process

    1. 1Fault

      • Vehicle Wide Programming (VWP) is a new process to update software on GM vehicles.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Various GM makes and models.
    • Condition：Vehicle Wide Programming (VWP) is a new process to update software on GM vehicles.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.

  2. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2024-06-25

    Service Programming System Error Codes E4398-E6961 Service Information

    1. 1Fault

      • Some technicians may notice Service Programming System (SPS) errors; the document gives the troubleshooting for them.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to GM passenger cars and light duty trucks, model years 2000 to 2025.
    • Condition：Some technicians may notice Service Programming System (SPS) errors; the document gives the troubleshooting for them.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.

  3. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2022-11-02

    Module Harvesting Service Bulletin

    1. 1Fault

      • To find the root cause of some component drains or logic lockups, the module is retrieved for analysis without being reset, by keeping it powered with a small battery.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This service bulletin provides information on Module Harvesting.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all passenger cars and trucks, 2000 to 2023 model years.
    • Condition：To find the root cause of some component drains or logic lockups, the module is retrieved for analysis without being reset, by keeping it powered with a small battery.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This service bulletin provides information on Module Harvesting.

  4. Manufacturer communication2000–2006 GMC YUKON XL ・ 2021-07-06

    EVAP System Leak Diagnosis for MIL with DTCs P0442/P0455

    1. 1Fault

      • The MIL is illuminated and DTC P0442 (EVAP small leak detected) and/or P0455 (EVAP large leak detected) is set in the Engine Control Module (ECM).

    2. 2Finding the cause

      Possible causes

      • DTC P0455 sets for a large leak or a purge blockage; a large leak can come from an unseated tube connection, a damaged tube, a stuck open canister vent valve or a stuck closed purge valve.
      • DTC P0442 sets for a small leak, which can come from a stuck open purge valve or a stuck open canister vent valve.

      Steps to confirm (in the document’s order)

      1. Inspect all purge connections for proper installation and look for damage or wear along the lines; if damage is seen, confirm with the smoke test.
      2. Some leaks show only under pressure and some only under vacuum, so check both ways.
      3. Cycling the purge and vent solenoids with GDS2 while inspecting may indicate a sticking valve.
      4. Critical connections on the engine side: purge tube to purge valve at the intake manifold, purge tube to chassis EVAP line at the rear of the engine near the transmission, and chassis EVAP line to canister.
      5. Critical connections on the tank side: fuel tank load line to canister, vent valve line to vent valve, fuel tank load line jumper connection near the fuel tank, and the fuel tank cap being closed properly.
      2 more points

    3. 3Correction

      This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to GM passenger cars and trucks, including medium duty, model years 2000 to 2021.
    • Applies to：The bulletin applies only to vehicles with gasoline engines.
    • Condition：The MIL is illuminated and DTC P0442 (EVAP small leak detected) and/or P0455 (EVAP large leak detected) is set in the Engine Control Module (ECM).
    • Cause：DTC P0455 sets for a large leak or a purge blockage; a large leak can come from an unseated tube connection, a damaged tube, a stuck open canister vent valve or a stuck closed purge valve.
    • Cause：DTC P0442 sets for a small leak, which can come from a stuck open purge valve or a stuck open canister vent valve.
    • Confirm：Inspect all purge connections for proper installation and look for damage or wear along the lines; if damage is seen, confirm with the smoke test.
    • Confirm：Some leaks show only under pressure and some only under vacuum, so check both ways.
    • Confirm：Cycling the purge and vent solenoids with GDS2 while inspecting may indicate a sticking valve.
    • Confirm：Critical connections on the engine side: purge tube to purge valve at the intake manifold, purge tube to chassis EVAP line at the rear of the engine near the transmission, and chassis EVAP line to canister.
    • Confirm：Critical connections on the tank side: fuel tank load line to canister, vent valve line to vent valve, fuel tank load line jumper connection near the fuel tank, and the fuel tank cap being closed properly.
    • Confirm：If all connections are good, check the vent valve for a stuck open position.
    • Confirm：If the vent valve is verified to be functioning correctly, go on to investigate the purge valve.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.

  5. Manufacturer communication2000–2006 GMC YUKON XL ・ 2021-06-14

    ECM Software Update for Auto Stop State of Charge Threshold

    1. 1Fault

      • The engine control module (ECM) software may allow the Auto Stop to occur at a state of charge below 65%.

    2. 2Finding the cause

      Possible causes

      • Auto Stop is supposed to be inhibited at 65% to protect against excessive battery wear and discharge.

      Steps to confirm (in the document’s order)

      • Involved vehicles are marked "open" on the Investigate Vehicle History screen in the GM Global Warranty Management system.

    3. 3Correction

      Repair

      • Dealers are to reprogram the K20 Engine Control Module.

      Parts

      • No parts are required for this software update.

      Caution

      • Do not download or install the files wirelessly.
      • Clear DTCs after programming is complete.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The model list includes the 2021 GMC Yukon and Yukon XL.
    • Condition：The engine control module (ECM) software may allow the Auto Stop to occur at a state of charge below 65%.
    • Cause：Auto Stop is supposed to be inhibited at 65% to protect against excessive battery wear and discharge.
    • Confirm：Involved vehicles are marked "open" on the Investigate Vehicle History screen in the GM Global Warranty Management system.
    • Repair：Dealers are to reprogram the K20 Engine Control Module.
    • Parts：No parts are required for this software update.
    • Caution：Do not download or install the files wirelessly.
    • Caution：Clear DTCs after programming is complete.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    Service Update Bulletin (Labor Codes Added). Certain vehicles may have a condition where the engine control module (ECM) software allows the Auto Stop to occur at a state of charge below 65%. Auto Stop is supposed to be inhibited at 65% to protect against excessive battery wear and discharge. Dealers are to reprogram the ECM.

  6. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2021-04-20

    OnStar Voice Fallback Number Update

    1. 1Fault

      Not stated

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Remedy
    OnStar® Voice Fallback Number Update Some customers may have received a letter from OnStar® stating that "We recently tried to provide a software update to the OnStar® hardware in your vehicle. However, your system could not be updated remotely. As a result, some of your OnStar® system functions may not be working as expected." The customer is further instructed in this letter to "Please contact your dealer – or any dealer near you – as soon as possible to schedule an appointment for this no-cost software update. Your dealer will reprogram your OnStar® module with an update. This is for vehicles that have previously received the Canada upgrade as described in Service Bulletin #15-08-44-001F."

  7. Manufacturer communication2000–2006 GMC YUKON XL ・ 2020-02-10(2 earlier editions of this document folded here)

    Tire Pressure Monitor and Diagnostic Tool Software Update

    1. 1Fault

      • The document gives the steps for downloading or updating the AFIT, TPM, GR8, MIT, PICO Scope or VDR tools.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester  and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：All brands and models, model years 1995 - 2020.
    • Condition：The document gives the steps for downloading or updating the AFIT, TPM, GR8, MIT, PICO Scope or VDR tools.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester  and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.

  8. Manufacturer communication2000–2006 GMC YUKON XL ・ 2019-11-12

    Preliminary Information: Vibration Diagnosis Using Pico Oscilloscope

    1. 1Fault

      • Customers complain of vehicle vibration under any of various driving conditions.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. Drive the vehicle to verify the condition and record a Pico data file of the concern.
      2. Review the Pico file and use it to help determine the root cause or component.

    3. 3Correction

      Repair

      • Repair the vehicle using the Pico information together with any published information relevant to the vibration frequency observed.

      Caution

      • Attempting a vibration repair without knowing the frequency is compared to repairing a check engine light without knowing the stored DTC.
      • 12-03-10-001B is a generic document on the possibility of tire to rim orientation and of the tire slipping on the rim.
      • Component level vibrations such as blower motor, brake pulsation or shudder on turns do not require a Pico file.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：All models, model years 2000 - 2020.
    • Condition：Customers complain of vehicle vibration under any of various driving conditions.
    • Caution：Attempting a vibration repair without knowing the frequency is compared to repairing a check engine light without knowing the stored DTC.
    • Confirm：Drive the vehicle to verify the condition and record a Pico data file of the concern.
    • Confirm：Review the Pico file and use it to help determine the root cause or component.
    • Repair：Repair the vehicle using the Pico information together with any published information relevant to the vibration frequency observed.
    • Caution：12-03-10-001B is a generic document on the possibility of tire to rim orientation and of the tire slipping on the rim.
    • Caution：Component level vibrations such as blower motor, brake pulsation or shudder on turns do not require a Pico file.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challenging complaints to accurately diagnose and repair. Technician will need to use Pico Oscilloscope Diagnostic Kit to effectively diagnosis vehicles. Technician should drive the vehicle will using the Pico Oscilloscope to record data. After the data is recorded it should be reviewed to determine the root cause of the concern. If a repair attempt made the concern better but not eliminated or had no affect at all, and are requesting assistance from General Motors Technical Assistance Center record another Pico file and save it to the computer. After the new Pico Oscilloscope data has been saved email the data to General Motors Technical Assistance Center in the subject line include ?Vibration? ?Business Associate Code? and the last 8 of the Vehicle Identification Number.

  9. Manufacturer communication2000–2006 GMC YUKON XL ・ 2018-06-18

    Apple Device USB Connectivity Information

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • Use only Apple cables/cords for diagnostic testing on any concern involving an Apple device.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all models 2000 - 2019 equipped with a USB port.
    • Repair：Use only Apple cables/cords for diagnostic testing on any concern involving an Apple device.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about connectivity concerns when connecting an Apple device via USB cord. Technician should insure the customer is using an original equipment manufacturer Apple USB cable.

  10. Manufacturer communication2000–2006 GMC YUKON XL ・ 2018-05-21(1 earlier editions of this document folded here)

    OnStar Module Software Update via GSA

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      • Verify in the Investigate Vehicle History (IVH) whether the upgrade has been completed before proceeding.

    3. 3Correction

      Repair

      1. Because GDS 2 will not decode the VIN of a vehicle originally supported by the Tech 2, a manual selection must be performed.
      2. Select Additional Options, then select the OnStar Canada GSM option.

      Caution

      • On GSM-upgraded vehicles, the GDS 2 must be used for scan tool communication with the Telematics Communication Interface Control Module (TCICM), or OnStar module.
      • All scan tool communications with other modules on these vehicles continue to be performed using the Tech 2.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The model list addresses 2000-2009 GM passenger cars and light duty trucks.
    • Applies to：The bulletin only applies to vehicles that have been involved in the Canadian OnStar cellular communication upgrade.
    • Confirm：Verify in the Investigate Vehicle History (IVH) whether the upgrade has been completed before proceeding.
    • Caution：On GSM-upgraded vehicles, the GDS 2 must be used for scan tool communication with the Telematics Communication Interface Control Module (TCICM), or OnStar module.
    • Caution：All scan tool communications with other modules on these vehicles continue to be performed using the Tech 2.
    • Repair：Because GDS 2 will not decode the VIN of a vehicle originally supported by the Tech 2, a manual selection must be performed.
    • Repair：Select Additional Options, then select the OnStar Canada GSM option.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This informational bulletin explains how to update the older Onstar module software to new software over GSA.

  11. Manufacturer communication2000–2006 GMC YUKON XL ・ 2018-05-07

    Turn-by-Turn Navigation Limitations for Canadian Vehicles in US

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Possible causes

      • The condition exists because the existing cell phone provider has no roaming agreements in areas outside of Canada.

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that are travelling from Canada to the United States. While in the United States they are unable to receive Turn-by-Turn directions. Due to the existing cellular provider not having roaming agreements in areas outside of Canada to support transmitting of the packet data required for Turn-By-Turn feature to operate. The customer has 3 options while traveling through the United Sates. First if the vehicle is equipped with a navigation radio they can request a "Destination Download" to the vehicle. Second if the customer uses the OnStar RemoteLink app they can send the directions to the vehicle. The third option would be to have the vehicle loaded with a ?500 phone number? The customer will no longer be able to use their Hands Free Calling minutes when the new 500 phone number is loaded. If a customer chooses to restore Hands Free Calling in the future a new phone number will be assigned to the vehicle; previous phone numbers are not available.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all 2000-2015 GM passenger cars and light duty trucks with a Gen6, Gen7, Gen8, Gen9 or Gen10 OnStar system.
    • Cause：The condition exists because the existing cell phone provider has no roaming agreements in areas outside of Canada.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that are travelling from Canada to the United States. While in the United States they are unable to receive Turn-by-Turn directions. Due to the existing cellular provider not having roaming agreements in areas outside of Canada to support transmitting of the packet data required for Turn-By-Turn feature to operate. The customer has 3 options while traveling through the United Sates. First if the vehicle is equipped with a navigation radio they can request a "Destination Download" to the vehicle. Second if the customer uses the OnStar RemoteLink app they can send the directions to the vehicle. The third option would be to have the vehicle loaded with a ?500 phone number? The customer will no longer be able to use their Hands Free Calling minutes when the new 500 phone number is loaded. If a customer chooses to restore Hands Free Calling in the future a new phone number will be assigned to the vehicle; previous phone numbers are not available.

  12. Manufacturer communication2000–2006 GMC YUKON XL ・ 2018-01-22

    OnStar Canada Upgrade - Caller ID Display Issue

    1. 1Fault

      • Incoming caller ID may no longer be available or displayed after the Canada OnStar upgrade is performed.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that the incoming caller ID may no longer be available or displayed after the Canada OnStar upgrade. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2000-2015 GM passenger cars and light duty trucks with the OnStar Canada upgrade.
    • Condition：Incoming caller ID may no longer be available or displayed after the Canada OnStar upgrade is performed.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that the incoming caller ID may no longer be available or displayed after the Canada OnStar upgrade. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.

  13. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-10-04(1 earlier editions of this document folded here)

    OnStar Programming and Activation Setup Procedures

    1. 1Fault

      • For OnStar to operate properly, the module must be programmed (set up) specifically for the vehicle application in which it is installed.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician on the programming and activation of the OnStar system. For many 2008 and prior model year GM vehicles, the programming is performed using the Tech 2 and the activation is initiated by a Service Programming System. For the 2010 and UP model year vehicles, the OnStar set-up procedure and OnStar Activation request have been combined into a single programming event called OnStar Set-up and Activation in Service Programming System.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all 2000 - 2018 models with RPO UE1.
    • Condition：For OnStar to operate properly, the module must be programmed (set up) specifically for the vehicle application in which it is installed.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician on the programming and activation of the OnStar system. For many 2008 and prior model year GM vehicles, the programming is performed using the Tech 2 and the activation is initiated by a Service Programming System. For the 2010 and UP model year vehicles, the OnStar set-up procedure and OnStar Activation request have been combined into a single programming event called OnStar Set-up and Activation in Service Programming System.

  14. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-31

    OnStar VCIM Restricted Parts Information

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • Only modules and components in a part restriction program require a call to the GM Technical Assistance Center (TAC) to obtain the part.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2016-2017 GM passenger cars and trucks, and 2000-2015 GM passenger cars and trucks with the Canada OnStar Upgrade.
    • Repair：Only modules and components in a part restriction program require a call to the GM Technical Assistance Center (TAC) to obtain the part.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This informational bulletin provides information on OnStar® VCIM is currently restricted parts. By working closely with our dealers and technicians, through the part restriction process, the General Motors team will gain a better understanding of any field concerns that may develop.

  15. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar Over The Air Updates - Unable to Receive

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • To receive any over-the-air programming or update, the customer must accept the OnStar terms and conditions and have an active OnStar account.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：2000-2016 GM passenger cars and light duty trucks with OnStar (UE1).
    • Repair：To receive any over-the-air programming or update, the customer must accept the OnStar terms and conditions and have an active OnStar account.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about being unable to receive OnStar ?Over The Air? updates. Technician will need to press the OnStar button and verify they have an active account and that the call connects with data and location.

  16. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar wireless fidelity inoperative - Preliminary Information

    1. 1Fault

      • A customer may comment that the OnStar WIFI is inoperative or stuck in 2G.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that may have the OnStar wireless fidelity inoperative. Technician will need to contact General Motors Technical Assistance Center with a scan tool connect to the vehicle for further assistance.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2015 GM passenger cars and light duty trucks with OnStar 4GLTE Gen10 WIFI (RPO VV4).
    • Condition：A customer may comment that the OnStar WIFI is inoperative or stuck in 2G.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that may have the OnStar wireless fidelity inoperative. Technician will need to contact General Motors Technical Assistance Center with a scan tool connect to the vehicle for further assistance.

  17. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Bluetooth Voice Recognition Issue with iPhone

    1. 1Fault

      • Emoji icons in the customer's iPhone Contacts list may keep Bluetooth voice recognition from working properly.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2016 and prior GM passenger cars and trucks.
    • Condition：Emoji icons in the customer's iPhone Contacts list may keep Bluetooth voice recognition from working properly.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact.

  18. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15(1 earlier editions of this document folded here)

    OnStar System Progression Tones Information

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • Cycle power to the VCIM and place a test call to OnStar; if the concern is still present, install the test antenna and retest.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2000 - 2015 GM passenger cars and light duty trucks with the OnStar Canada Upgrade (OnStar 9.4 or Gen 10); 2015 - 2017 vehicles with OnStar Gen10 are listed separately.
    • Repair：Cycle power to the VCIM and place a test call to OnStar; if the concern is still present, install the test antenna and retest.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue or red button. Technician will need to contact General Motors Technical Assistance Center with the scan tool data from the OnStar system.

  19. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar System Progression Tones Service Communication

    1. 1Fault

      • Pressing the OnStar blue button, the red emergency button or the hands-free call button results in cellular messages, progression tones, dropped calls or no data on the call with OnStar.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2000-2015 GM passenger cars and light duty trucks with OnStar Gen6, Gen7, Gen8 or Gen9.
    • Condition：Pressing the OnStar blue button, the red emergency button or the hands-free call button results in cellular messages, progression tones, dropped calls or no data on the call with OnStar.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

  20. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15(1 earlier editions of this document folded here)

    OnStar Module Parasitic Drain Test Preliminary Information

    1. 1Fault

      • During a battery parasitic drain test it can be unclear what the normal power consumption of the OnStar system should be.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. The system generation can be read with a Tech 2 under Body > VCIM > Module ID Information > Module Information 2.
      2. All Gen 6, 7, 8 and 9 systems are powered continuously for 48 hours from ignition off.
      3. After the 48 hours, Gen 6 and some Gen 7 power off; Gen 7.XXL and all Gen 8 systems cycle 9 minutes OFF and 1 minute ON for an additional 72 hours.
      4. Expected current draw of the OnStar module with ignition ON is 240 to 400 mA.
      5. With ignition OFF and in DRx (stand-by mode) the draw is 3 to 20 mA, for 48 hours on Gen 6, 7, 8.
      1 more points

    3. 3Correction

      Caution

      • The OnStar system stays powered for an extended time after ignition off so that remote services such as door unlock, horn honk and light flash can be carried out.
      • A short spike of current may be seen at the beginning and end of the 1 minute ON stage.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：All models, model years 2000 - 2017, with OnStar Gen6, Gen7, Gen8, Gen9 and Gen10.
    • Condition：During a battery parasitic drain test it can be unclear what the normal power consumption of the OnStar system should be.
    • Caution：The OnStar system stays powered for an extended time after ignition off so that remote services such as door unlock, horn honk and light flash can be carried out.
    • Confirm：The system generation can be read with a Tech 2 under Body > VCIM > Module ID Information > Module Information 2.
    • Confirm：All Gen 6, 7, 8 and 9 systems are powered continuously for 48 hours from ignition off.
    • Confirm：After the 48 hours, Gen 6 and some Gen 7 power off; Gen 7.XXL and all Gen 8 systems cycle 9 minutes OFF and 1 minute ON for an additional 72 hours.
    • Confirm：Expected current draw of the OnStar module with ignition ON is 240 to 400 mA.
    • Confirm：With ignition OFF and in DRx (stand-by mode) the draw is 3 to 20 mA, for 48 hours on Gen 6, 7, 8.
    • Confirm：With ignition OFF and after DRx has been canceled the draw is 1 to 3 mA, reached after 48 hours on Gen 6, 7, 8.
    • Caution：A short spike of current may be seen at the beginning and end of the 1 minute ON stage.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to help the dealership technicians perform a parasitic drain test for the OnStar module. When performing battery parasitic drain test, there may be some confusion as to what the normal power consumption reading should be from the OnStar system.

  21. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar Turn-By-Turn Navigation System Inoperative

    1. 1Fault

      • The customer may report that the OnStar center is unable to provide Turn by Turn (TBT) service.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have an OnStar Turn-By-Turn Navigation the system that is inoperative. Technician verifies there are no Diagnostic Trouble Codes are present in the Antilock Braking System and Vehicle Communication Interface Module of the vehicle. If no Diagnostic Trouble Codes found call OnStar using the Blue button on the OnStar key pad and ask the advisor for a turn by turn route. Also make a OnStar personal call and a call into the vehicle. If normal diagnostics do not lead to a resolution technician will need to call General Motors Technical Assistance Center for further assistance.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：All models, model years 2000 - 2017.
    • Condition：The customer may report that the OnStar center is unable to provide Turn by Turn (TBT) service.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have an OnStar Turn-By-Turn Navigation the system that is inoperative. Technician verifies there are no Diagnostic Trouble Codes are present in the Antilock Braking System and Vehicle Communication Interface Module of the vehicle. If no Diagnostic Trouble Codes found call OnStar using the Blue button on the OnStar key pad and ask the advisor for a turn by turn route. Also make a OnStar personal call and a call into the vehicle. If normal diagnostics do not lead to a resolution technician will need to call General Motors Technical Assistance Center for further assistance.

  22. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Unwanted or Phantom Phone Calls Diagnosis and Repair

    1. 1Fault

      • A customer may report that the OnStar system attempts or completes phone calls that the operator of the vehicle did not initiate.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician the steps needed to diagnose and repair the vehicles that may have unwanted or phantom phone calls. Technician will need to determine what type of call the customer is having that is unwanted. The vehicle may receive an incoming call just like any other phone. Typically the customer will hear the phone ringing in the vehicle. This scenario also includes incoming Bluetooth calls. One type of unwanted call can be made if the key pad is faulty the OnStar system will try to make a blue button call for shorted voltage in the circuits. The OnStar module could have an internal fault and produce a ″Phone Unavailable″ audio message also it may have a Diagnostic Trouble Code U1500 or B1000. Refer to diagnostics for the Diagnostic Trouble Code making sure to follow any applicable Bulletins or Preliminary Information sheets. A “Ready” or “OnStar ready” audio message heard while driving. In some cases it has been found that the customer is inadvertently pressing the ″push to talk″ button on the steering wheel controls. On rare occasions, other issues in the steering column or Steering Wheel Control system may induce this concern.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all brands and models, model years 2000 - 2017.
    • Condition：A customer may report that the OnStar system attempts or completes phone calls that the operator of the vehicle did not initiate.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician the steps needed to diagnose and repair the vehicles that may have unwanted or phantom phone calls. Technician will need to determine what type of call the customer is having that is unwanted. The vehicle may receive an incoming call just like any other phone. Typically the customer will hear the phone ringing in the vehicle. This scenario also includes incoming Bluetooth calls. One type of unwanted call can be made if the key pad is faulty the OnStar system will try to make a blue button call for shorted voltage in the circuits. The OnStar module could have an internal fault and produce a ″Phone Unavailable″ audio message also it may have a Diagnostic Trouble Code U1500 or B1000. Refer to diagnostics for the Diagnostic Trouble Code making sure to follow any applicable Bulletins or Preliminary Information sheets. A “Ready” or “OnStar ready” audio message heard while driving. In some cases it has been found that the customer is inadvertently pressing the ″push to talk″ button on the steering wheel controls. On rare occasions, other issues in the steering column or Steering Wheel Control system may induce this concern.

  23. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Terminal Pin Fit and Tension Testing Guidelines

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. When a test step for open, continuity or resistance requires disconnecting a connector or component, check the pin fit and tension of all related terminals before replacing any component.
      2. Always use the recommended terminal test tool for these tests.

    3. 3Correction

      This Preliminary Information communication advises the technician that, when testing any circuit for open or resistance, it is imperative that all related terminal pin fit and tension be checked when the test steps require disconnection of the connector or component, prior to any component replacement. Always use the recommended terminal test tool during these tests.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：2014 and prior GM cars and light duty trucks.
    • Confirm：When a test step for open, continuity or resistance requires disconnecting a connector or component, check the pin fit and tension of all related terminals before replacing any component.
    • Confirm：Always use the recommended terminal test tool for these tests.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication advises the technician that, when testing any circuit for open or resistance, it is imperative that all related terminal pin fit and tension be checked when the test steps require disconnection of the connector or component, prior to any component replacement. Always use the recommended terminal test tool during these tests.

  24. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar Communication Interface Module Power Issue

    1. 1Fault

      • Some Gen 6 OnStar vehicles have a no power/no connect concern; the LED may or may not be lit red and a current DTC U1500 may be present.
      • The message "PHONE UNAVAILABLE" may keep repeating without any user input.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • OnStar Engineering found that Gen6 VCIMs with STID in the ranges 14,000,000 - 16,000,000 and/or 22,000,000 - 23,200,000 may induce this concern and need to be replaced.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2000-2006 GM passenger cars and trucks with OnStar Gen6.
    • Condition：Some Gen 6 OnStar vehicles have a no power/no connect concern; the LED may or may not be lit red and a current DTC U1500 may be present.
    • Condition：The message "PHONE UNAVAILABLE" may keep repeating without any user input.
    • Repair：OnStar Engineering found that Gen6 VCIMs with STID in the ranges 14,000,000 - 16,000,000 and/or 22,000,000 - 23,200,000 may induce this concern and need to be replaced.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles may have a no power or no connect concern. Technician will find that the OnStar led is red and Diagnostic Trouble Code U1500 is set. Technician will need to replace the Vehicle Communication Interface Module if the Station Identification number falls in the ranges 14,000,000 - 16,000,000 or 22,000,000 - 23,200,000.

  25. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    OnStar System Voice Commands and Number Response Issue

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      • Test the OnStar voice recognition (VR) system with the customer in the vehicle to verify the condition.

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that have the OnStar system does not respond properly to some numbers and/or voice commands. Dealer should direct the customer to review the operational characteristics in the OnStar Users Guide.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：2000-2015 GM passenger cars and light duty trucks with OnStar Gen6, Gen7, Gen8, Gen9 or Gen10.
    • Confirm：Test the OnStar voice recognition (VR) system with the customer in the vehicle to verify the condition.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that have the OnStar system does not respond properly to some numbers and/or voice commands. Dealer should direct the customer to review the operational characteristics in the OnStar Users Guide.

  26. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-08-15

    Diagnostic Trouble Code B101D-37 History Information

    1. 1Fault

      • History DTC B101D-37 may be found in the OnStar VCIM; it only displays in history on the scan tool and does not cause issues with OnStar operation.

    2. 2Finding the cause

      Not stated

    3. 3Correction

      This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module. Engineering has determined that this code will only display in history on the scan tool and will not cause issues with OnStar system operation.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：2011-2017 GM passenger cars and light duty trucks with OnStar (RPO UE1), and 2000 - 2015 Canada GM passenger cars and trucks with the Canada Upgrade.
    • Condition：History DTC B101D-37 may be found in the OnStar VCIM; it only displays in history on the scan tool and does not cause issues with OnStar operation.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module. Engineering has determined that this code will only display in history on the scan tool and will not cause issues with OnStar system operation.

ELECTRICAL1

  1. Recall2000–2001 GMC YUKON XL ・ 2005-04-15

    Fuel Module Reservoir Assembly Overheating Recall

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Cause
    Certain vehicles were built with fuel module reservoir assemblies that contain fuel pump wires and/or connectors that may overheat under certain operating conditions. Fuel pump wires that overheat may become exposed and result in one or more conditions; 1) If the ignition circuit wire is exposed and shorts to ground, the fuel pump fuse will blow, disabling the fuel pump and causing an engine stall or no-start condition. 2) If sufficient heat is conducted to the pass-through connector, a hole in the connector may result, which may cause the Service Engine Soon light to be illuminated during the emission system diagnostics routine. Fuel vapour (and in some limited cases liquid fuel) may leak out of the fuel tank through the hole in the connector body. 3) If the ignition circuit or ground wire is exposed and shorts to the fuel level sender card wires, inaccurate fuel level readings may result. Correction: Dealers will affect repairs.

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