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GMC Yukon XL 2000–2006

GMC Yukon XLModel years 2000–2006

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The vehicle (where a record says)

A record is under an engine, a drive or a series only where it says so: the characters of the vehicle identification number filed with a complaint, its text, or what its document says it applies to. A record that does not say is kept as "not stated". The filed numbers and the documents do not tell 4WD from AWD.

Common on this vehicle:Gauge or instrument faultWarning lightCorrosion or rustNoiseLeakReduced brakingStalls or shuts offLoss of engine power, no acceleration

Record by record

123 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

  • says it was fixed2
  • says it held for a while1
  • says it did not fix it4
  • result not stated12

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 (16)

Known issuesInstrument panel cluster gauges stick, flutter or stop working5

  1. Owner complaint2004 GMC YUKON XL ・ 2014-07-25

    Speedometer and dashboard gauges intermittently malfunction

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      TO REPAIR THEY HAVE TO REMOVE THE DASHBOARD. *TR

      What the documents say to do

      Instrument panel cluster gauges stick, flutter or stop working

      Repair

      • Dealers replace the instrument panel cluster after verifying the condition.
    Read the sentences of the record
    Fault
    ALSO THE OTHER GAUGES IN DASH BOARD WILL QUIT WORKING. (2 more)
    Remedy
    TO REPAIR THEY HAVE TO REMOVE THE DASHBOARD. *TR
    Inspection
    I CHECKED WITH A MECHANIC AND HE SAYS THIS IS COMMON FOR THE MODEL I HAVE.
    Consequence
    IT HAS CAUSED BOTH MY HUSBAND TICKETS OR WARNINGS BECAUSE IT DOES NOT WORK.

  2. Owner complaint2003 GMC YUKON DENALI XL ・ 2009-01-06

    Erratic speed gauge and odometer

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      RESETTING THE LOGIC BY TURNING IGNTIION ON/OFF REPEATEDLY RESETS THE GAUGE. (1 more)

      What the documents say to do

      Instrument panel cluster gauges stick, flutter or stop working

      Repair

      • Dealers replace the instrument panel cluster after verifying the condition.
    Read the sentences of the record
    Fault
    ERRATIC SPEED ODOMETER. (1 more)
    Remedy
    RESETTING THE LOGIC BY TURNING IGNTIION ON/OFF REPEATEDLY RESETS THE GAUGE. (1 more)

  3. Owner complaint2003 GMC YUKON XL ・ 2008-04-14

    Speed and odometer sticking or not working

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    I HAVE RECENTLY PURCHASED A 2003 GMC YUKON XL AND SINCE I BOUGHT THIS CAR I HAVE HAD SEVERAL PROBLEMS WITH THE SPEED ODOMETER STICKING AT DIFFERENT MPH OR JUST NOT WORKING ALL THE WAY AROUND.
    Remedy
    TO WHICH THE RECEIPT FROM THE DEALERSHIP STATES THEY REPLACED THE WHOLE CLUSTER. *TR
    Outcome
    I HAVE RECENTLY GOT THE PROBLEM FIXED.

  4. Owner complaint2003 GMC YUKON XL 1500 ・ 2007-10-30

    Speedometer failure with intermittent fluctuations after replacement

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      THE PART WAS REPLACED.

      What the documents say to do

      Instrument panel cluster gauges stick, flutter or stop working

      Repair

      • Dealers replace the instrument panel cluster after verifying the condition.
    Read the sentences of the record
    Fault
    SPEEDOMETER FAILURE.
    Remedy
    THE PART WAS REPLACED.
    Consequence
    NO CRASH OR INJURIES.

  5. Owner complaint2004 GMC YUKON XL ・ 2007-05-08

    Speedometer reading incorrectly while driving

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Fault
    WHILST DRIVING ON I-10 IT WAS NOTED THE INDICATED SPEED WAS LESS THAN POSTED. (1 more)
    Remedy
    THE DEALER REPLACED THE INSTRUMENT CLUSTER .
    Consequence
    BY THE TIME I REALIZED THE SPEEDOMETER WAS READING INCORRECTLY I WAS ZOOMING PAST OTHER TRAFFIC.

Known issuesFuel gauge reads low or drops to empty in Park / Neutral (normal characteristic)1

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

    Fuel Gauge Accuracy—Preliminary Information

    1. 1Fault

      • The fuel gauge may be inaccurate or drop to empty (E) with the low fuel light coming on.
      • The condition is most apparent when the gauge is at or below the quarter (1/4) tank mark.

    2. 2Finding the cause

      Possible causes

      • On an automatic transmission no buffering of the fuel gauge takes place when the transmission is in park or neutral.

      Steps to confirm (in the document’s order)

      1. Try to duplicate it by driving a short distance in reverse and stopping (to make fuel slosh), shifting to park or neutral and then to drive.
      2. Note how the vehicle is being parked (on an incline, front of the vehicle up hill or down hill).

    3. 3Correction

      Caution

      • This is a normal characteristic and no repairs are necessary.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The model list names 2000-2015 GMC Yukon models.
    • Condition：The fuel gauge may be inaccurate or drop to empty (E) with the low fuel light coming on.
    • Condition：The condition is most apparent when the gauge is at or below the quarter (1/4) tank mark.
    • Confirm：Try to duplicate it by driving a short distance in reverse and stopping (to make fuel slosh), shifting to park or neutral and then to drive.
    • Confirm：Note how the vehicle is being parked (on an incline, front of the vehicle up hill or down hill).
    • Cause：On an automatic transmission no buffering of the fuel gauge takes place when the transmission is in park or neutral.
    • Caution：This is a normal characteristic and no repairs are necessary.

    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 an inaccurate fuel gauge. Technician should drive the vehicle to duplicate the concern. The fuel gauge will have a tendency to falsely indicate a lower fuel level than what is actually present. The fuel gauge will take a few minutes to show the correct fuel level. On vehicles equipped with an automatic transmission no buffering takes place when the transmission is in park or neutral. This is a normal characteristic and no repairs are necessary. On vehicles equipped with a manual transmission the fuel gauge is buffered in all gears and neutral. There is a timer which starts to count up when the clutch is depressed. When this timer reaches its calibrated value the buffering stops. This is a normal characteristic and no repairs are necessary.

Known issuesVoltmeter fluctuates between 12 and 14 volts (Regulated Voltage Control, normal)1

  1. Manufacturer communication2005–2006 GMC YUKON XL ・ 2018-06-04(1 earlier editions of this document folded here)

    Voltmeter Gauge Fluctuation and Battery Charging Information

    1. 1Fault

      • Customers may comment that the voltmeter is fluctuating between 12 and 14 volts.
      • When towing or hauling a camper/trailer, customers may comment that the auxiliary battery for the camper/trailer will not stay charged.

    2. 2Finding the cause

      Possible causes

      • Starting with the 2005 model year, light duty full size pickups and utilities have a Regulated Voltage Control (RVC) system.
      • The RVC system reduces the targeted generator output to 12.6–13.1 volts in "Fuel Economy Mode" to improve fuel economy.

    3. 3Correction

      Repair

      1. With the tow/haul feature enabled, the RVC system stays in "Charge Mode" and the targeted generator output voltage is 13.9–15.5 volts, depending on battery state of charge and estimated battery temperature.
      2. The second method is to turn on the headlights, which increases the generator's targeted output voltage to 13.9–14.5 volts.

      Caution

      • This fluctuation with the RVC system is normal system operation and no repairs should be attempted.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The model list names 2005-2014 GMC Yukon models.
    • Condition：Customers may comment that the voltmeter is fluctuating between 12 and 14 volts.
    • Cause：Starting with the 2005 model year, light duty full size pickups and utilities have a Regulated Voltage Control (RVC) system.
    • Cause：The RVC system reduces the targeted generator output to 12.6–13.1 volts in "Fuel Economy Mode" to improve fuel economy.
    • Caution：This fluctuation with the RVC system is normal system operation and no repairs should be attempted.
    • Condition：When towing or hauling a camper/trailer, customers may comment that the auxiliary battery for the camper/trailer will not stay charged.
    • Repair：With the tow/haul feature enabled, the RVC system stays in "Charge Mode" and the targeted generator output voltage is 13.9–15.5 volts, depending on battery state of charge and estimated battery temperature.
    • Repair：The second method is to turn on the headlights, which increases the generator's targeted output voltage to 13.9–14.5 volts.

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

    Remedy
    This informational bulletin adds models to information on voltmeter gauge fluctuation due to regulated voltage control system and concerns about camper/trailer battery charging.

ELECTRICAL SYSTEM6

  1. Owner complaint2003 GMC YUKON XL ・ 2010-02-16

    Vehicle stalls while in motion and when braking

    1. 1Fault

    2. 2Finding the cause

      FIGURED OUT IT MAY BE RUNNING OUT OF GAS DUE TO THE GAUGE NOT WORKING.

    3. 3Correction

    Read the sentences of the record
    Fault
    VEHICLE STALLS WHILE IN MOTION. (1 more)
    Cause
    FIGURED OUT IT MAY BE RUNNING OUT OF GAS DUE TO THE GAUGE NOT WORKING.
    Remedy
    REPLACED THE FUEL FILTER TWICE. (1 more)

  2. Manufacturer communication2003–2006 GMC YUKON XL DENALI ・ 2023-12-26(6 earlier editions of this document folded here)

    Speedometer Needle Accuracy Information

    1. 1Fault

      • A customer may say the speedometer needle appears inaccurate.

    2. 2Finding the cause

      Possible causes

      • The speedometer needle is driven electrically by a stepper motor and some variation in accuracy is possible.
      • Tire size, tread life and inflation may cause some variation in the readings.

      Steps to confirm (in the document’s order)

      1. Digital readouts such as the "Digital Speedometer" on the DIC read the Vehicle Speed Sensor (VSS) directly and are much more accurate.
      2. The specification for needle accuracy is +/- 2 MPH (= 3.22 km/h) at any given speed when looking straight at the needle.

    3. 3Correction

      Speedometer Needle Accuracy Information.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2003-2015 GMC Sierra and Yukon models (note: the Yukon years run later than the years this service covers).
    • Condition：A customer may say the speedometer needle appears inaccurate.
    • Cause：The speedometer needle is driven electrically by a stepper motor and some variation in accuracy is possible.
    • Confirm：Digital readouts such as the "Digital Speedometer" on the DIC read the Vehicle Speed Sensor (VSS) directly and are much more accurate.
    • Cause：Tire size, tread life and inflation may cause some variation in the readings.
    • Confirm：The specification for needle accuracy is +/- 2 MPH (= 3.22 km/h) at any given speed when looking straight at the needle.

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

    Remedy
    Speedometer Needle Accuracy Information.

  3. Manufacturer communication2003–2006 GMC YUKON XL DENALI ・ 2023-10-18(6 earlier editions of this document folded here)

    IPC odometer programming method notification

    1. 1Fault

      • It is a reference guide for identifying which odometer programming method to use after replacing the instrument panel cluster (IPC).

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      1. The table lists the 2003-2006 Yukon with the odometer value stored in the IPC and SPS as the programming method.
      2. The SPS method is IPC reprogramming and setup using the service programming system (SPS).

      Caution

      • Vehicles not listed in the document need to follow the SPS Programming for Odometer.
      • Stable battery voltage is critical during programming; any fluctuation, spiking, over voltage or loss of voltage will interrupt it.
      • Install the EL-49642 SPS Programming Support Tool (GM Dealer Equipment Item #PSC-550) to maintain system voltage; if not available, connect a fully charged 12V jumper or booster pack disconnected from the AC supply, and do not connect a battery charger.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The bulletin is addressed to 2020 and prior GM passenger cars and trucks sold in the U.S. and Canada only.
    • Condition：It is a reference guide for identifying which odometer programming method to use after replacing the instrument panel cluster (IPC).
    • Repair：The table lists the 2003-2006 Yukon with the odometer value stored in the IPC and SPS as the programming method.
    • Repair：The SPS method is IPC reprogramming and setup using the service programming system (SPS).
    • Caution：Vehicles not listed in the document need to follow the SPS Programming for Odometer.
    • Caution：Stable battery voltage is critical during programming; any fluctuation, spiking, over voltage or loss of voltage will interrupt it.
    • Caution：Install the EL-49642 SPS Programming Support Tool (GM Dealer Equipment Item #PSC-550) to maintain system voltage; if not available, connect a fully charged 12V jumper or booster pack disconnected from the AC supply, and do not connect a battery charger.

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

    Remedy
    This informational bulletin provides information for the IPC odometer programming method quick reference guide.

  4. Manufacturer communication2003–2006 GMC YUKON XL DENALI ・ 2021-04-16

    IPC Odometer Programming Method Quick Reference

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      IPC Odometer Programming Method Quick Reference Guide

    Read the sentences of the record
    Remedy
    IPC Odometer Programming Method Quick Reference Guide

  5. Manufacturer communication2000–2006 GMC YUKON XL ・ 2017-12-14(1 earlier editions of this document folded here)

    Inaccurate Odometer Reading – Preliminary Information

    1. 1Fault

      • A customer may say the odometer appears inaccurate compared with a known distance traveled.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. Use a hand-held GPS unit to test the odometer.
      2. On a straight road over a mile long, mark the GPS waypoint when the odometer (not the trip odometer) rolls over a digit.
      3. Confirm that the original size tires and wheels are mounted and that the axle ratio is as specified on the SPID label and unmodified.
      4. If those are correct and the odometer is beyond the limit, consider the relationship between the VSS and the reluctor on the transmission output shaft.
      5. Closely inspect the associated wiring and any connectors in the circuits.

    3. 3Correction

      Repair

      • Finally, it may be necessary to exchange the IPC with a replacement unit.

      Caution

      • Generally a tolerance of plus or minus 4% is allowed.
      • Do not compare with another vehicle or with the trip odometer.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all brands and models, model years 2000 - 2018.
    • Condition：A customer may say the odometer appears inaccurate compared with a known distance traveled.
    • Caution：Generally a tolerance of plus or minus 4% is allowed.
    • Confirm：Use a hand-held GPS unit to test the odometer.
    • Confirm：On a straight road over a mile long, mark the GPS waypoint when the odometer (not the trip odometer) rolls over a digit.
    • Caution：Do not compare with another vehicle or with the trip odometer.
    • Confirm：Confirm that the original size tires and wheels are mounted and that the axle ratio is as specified on the SPID label and unmodified.
    • Confirm：If those are correct and the odometer is beyond the limit, consider the relationship between the VSS and the reluctor on the transmission output shaft.
    • Confirm：Closely inspect the associated wiring and any connectors in the circuits.
    • Repair：Finally, it may be necessary to exchange the IPC with a replacement unit.

    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's odometer appears to be inaccurate relative to a known distance traveled. Technician should obtain a hand-held GPS unit to test the odometer. If a hand held GPS unit is not available, the only other option is to verify the miles traveled using a surveyor's wheel or a dynamometer.

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

    Instrument Panel Cluster Mileage Programming Information

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Repair

      • When the odometer cannot be set to the actual vehicle mileage, it must be set at zero and a label affixed to the driver's door frame by the service agent.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2014 and prior GM passenger cars and trucks.
    • Repair：When the odometer cannot be set to the actual vehicle mileage, it must be set at zero and a label affixed to the driver's door frame by the service agent.

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

    Remedy
    This Preliminary Information communication provides information to the technician that after replacing the Instrument Panel Cluster the exchange center is unable to program the actual mileage on the odometer or the actual mileage is unknown. Dealer will need to follow dealer to the General Motors service policies and procedures manual section 3.2.4 odometer servicing.

ENGINE AND ENGINE COOLING1

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

    Engine Check Lamp P0442 Evaporative Emissions System Notification

    1. 1Fault

      • The service engine soon lamp (MIL) is on for DTC P0442, but a leak cannot be verified with the system test in the service information.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. With the scan tool, command the EVAP system CLOSED, start the engine and watch the tank pressure sensor value for about two minutes.
      2. If the tank pressure value changes (shows vacuum), remove the purge solenoid and pressurize its fuel tank side with the GE 41413-A / J 41413-A tester.
      3. If the tank pressure value does not change, install the CH-48096 adaptor between the purge line from the canister and the purge solenoid; use no other adaptor or pressurization method.
      4. With the EVAP system CLOSED, pressurize through the adaptor and let the system stabilize, watching the gauge for at least 5 minutes, then add smoke.
      5. Look for smoke or UV trace fluid at the purge solenoid, the engine side, the fuel cap or capless fill door, and the canister vent solenoid filter or fresh-air line.
      1 more points

    3. 3Correction

      Repair

      • If smoke passes through the purge solenoid, replace the purge solenoid.

      Caution

      • After verifying P0442, do not disturb any fuel system component before testing.
      • Test pressure must not exceed 13 in H2O (0.5 PSI (= 3.45 kPa)); more can make components perform inaccurately and lead to misdiagnosis.
      • A large temperature difference between vehicle, shop and tester seriously affects accuracy; let the vehicle adjust to shop temperature first.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2016 and prior passenger cars and trucks.
    • Condition：The service engine soon lamp (MIL) is on for DTC P0442, but a leak cannot be verified with the system test in the service information.
    • Caution：After verifying P0442, do not disturb any fuel system component before testing.
    • Confirm：With the scan tool, command the EVAP system CLOSED, start the engine and watch the tank pressure sensor value for about two minutes.
    • Confirm：If the tank pressure value changes (shows vacuum), remove the purge solenoid and pressurize its fuel tank side with the GE 41413-A / J 41413-A tester.
    • Repair：If smoke passes through the purge solenoid, replace the purge solenoid.
    • Confirm：If the tank pressure value does not change, install the CH-48096 adaptor between the purge line from the canister and the purge solenoid; use no other adaptor or pressurization method.
    • Confirm：With the EVAP system CLOSED, pressurize through the adaptor and let the system stabilize, watching the gauge for at least 5 minutes, then add smoke.
    • Confirm：Look for smoke or UV trace fluid at the purge solenoid, the engine side, the fuel cap or capless fill door, and the canister vent solenoid filter or fresh-air line.
    • Confirm：If smoke testing finds nothing, the leak may exist only under vacuum: use the scan tool Purge/Seal function to pull a vacuum and watch the FTP sensor parameter for vacuum decay.
    • Caution：Test pressure must not exceed 13 in H2O (0.5 PSI (= 3.45 kPa)); more can make components perform inaccurately and lead to misdiagnosis.
    • Caution：A large temperature difference between vehicle, shop and tester seriously affects accuracy; let the vehicle adjust to shop temperature first.

    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. Technician may find Diagnostic Trouble Code P0442. Technician will need to review Techlink article from May 2013 titled "Using the Evaporative Emissions System Tester" Technician will need to follow these steps to help diagnose the issue. First after the P0442 has been verified do not disturb any of the fuel system components. The technician now can use the scan tool to close the Evaporative Emissions System. If possible change the tank pressure sensor units from inch_H2O to milimeter_Hg for better resolution. Now the vehicle can be stared to monitor the tank pressure sensor output value for approximately two minutes. If the tank pressure sensor value does change, pressurize the fuel tank side of the purge solenoid with the GE 41413-A / J 41413-A and the necessary adaptors. Now add smoke and allow pressure to stabilize for 2 minutes. If smoke is allowed to pass through the purge solenoid, replace the purge solenoid. If the tank pressure sensor value does not change, then install CH-48096 adaptor between the purge line from the canister and the purge solenoid. With the Evaporative Emissions System closed, pressurize the system through the CH-48096 adaptor and allow the system to completely stabilize, by observing the Press / Vac Gauge for a minimum of 5 minutes. Now add smoke to the system with GE 41413-A / J 41413-A after system stabilization. Now inspect the purge solenoid, engine side, fuel cap, canister vent solenoid filter and any line quick connects. When the leak is unable to be located, test under a vacuum condition. his type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the Evaporative Emissions System and then observe the FTP sensor parameter for vacuum decay.

EQUIPMENT1

  1. Manufacturer communication2006 GMC YUKON XL 2500 ・ 2023-12-04(6 earlier editions of this document folded here)

    Aftermarket ALDL/DLC Interface Devices Causing Multiple Issues

    1. 1Fault

      • Bus or LAN traffic may stay active, leading to a discharged vehicle battery.
      • C0561 may be stored in the EBCM, leading to a traction control issue.
      • The SES, MIL or CEL light may be set with numerous communication DTCs such as U0100, U0101, U186B and U1862.
      • The transmission may not shift for one key cycle (TCM in default mode).
      • Gauge readings may be erratic or displays may flicker.
      1 more points

    2. 2Finding the cause

      Possible causes

      • Monitoring devices and other electronic accessories such as aftermarket cruise control or police speed checking devices (RADAR or LIDAR) may cause one or more of the listed concerns.
      • Many of the problems could be caused by an open connection on the HSCAN bus: a device that connects to only one CAN + causes bus errors and erratic ECU behavior.

      Steps to confirm (in the document’s order)

      • If nothing else can be identified as the root cause, check for a device plugged into the Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC) for tracking or maintenance interval scheduling.

    3. 3Correction

      Repair

      • If the device is available, try to duplicate the condition, then remove the device to see whether the condition is eliminated.

      Caution

      • The customer may have removed the device for use in another vehicle while the vehicle is in for service.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2006-2014 GM passenger cars and trucks.
    • Condition：Bus or LAN traffic may stay active, leading to a discharged vehicle battery.
    • Condition：C0561 may be stored in the EBCM, leading to a traction control issue.
    • Condition：The SES, MIL or CEL light may be set with numerous communication DTCs such as U0100, U0101, U186B and U1862.
    • Condition：The transmission may not shift for one key cycle (TCM in default mode).
    • Condition：Gauge readings may be erratic or displays may flicker.
    • Condition：Electric power steering boost may be erratic, potentially with codes U2109, U2107, U2100, B1325 and C0000.
    • Confirm：If nothing else can be identified as the root cause, check for a device plugged into the Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC) for tracking or maintenance interval scheduling.
    • Cause：Monitoring devices and other electronic accessories such as aftermarket cruise control or police speed checking devices (RADAR or LIDAR) may cause one or more of the listed concerns.
    • Cause：Many of the problems could be caused by an open connection on the HSCAN bus: a device that connects to only one CAN + causes bus errors and erratic ECU behavior.
    • Caution：The customer may have removed the device for use in another vehicle while the vehicle is in for service.
    • Repair：If the device is available, try to duplicate the condition, then remove the device to see whether the condition is eliminated.

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

    Remedy
    Aftermarket ALDL or DLC Interface Devices Causing Multiple Issues

FUEL/PROPULSION SYSTEM1

  1. Owner complaint2006 GMC YUKON XL ・ 2022-10-30

    Faulty fuel gauge displaying empty and full intermittently

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    My GMC YukonXL Denali has faulty fuel gauges therefore there is no way I can determine if I'm are out of gas or not. (1 more)
    Cause
    I found online that over time, the contacts in the fuel-level sensor could wear and cause an incorrect reading on the gas gauge.

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