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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 lightLeakNoiseCorrosion or rustParking brakeStalls or shuts offGauge or instrument faultAir conditioning or heater

Record by record

47 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 stated5

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 (18)

Known issuesBrake pipe (brake line) corrosion and rupture2

  1. Owner complaint2001 GMC YUKON XL ・ 2014-01-02

    Brake pedal goes to floor with decreased stopping ability

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Fault
    BRAKE PEDAL GOES ALL THE WAY TO THE FLOOR WITH DECREASED STOPPING ABILITY.
    Remedy
    ALL LINES HEAVILY CORRODED AND ARE CURRENTLY BEING REPLACED. *TR
    Inspection
    SHOP FOUND CORRODED BRAKE LINES WITH FLUID LEAKING.

  2. Owner complaint2001 GMC YUKON XL ・ 2013-06-07

    Brake fluid leak with pedal to floor and rusty brake lines

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Fault
    BRAKE PEDAL WENT TO FLOOR. (2 more)
    Remedy
    DEALER FABRICATED AND REPLACED ALL BRAKE LINES FROM FRT TO JUNCTION ABOVE SPARE TIRE. *TR
    Inspection
    HAD TRUCK TOWED TO DEALER, WHO FOUND BRAKE LINE LEAKING ABOVE FUEL TANK AND NOTED ALL BRAKE LINES VERY RUSTY (EXCEPT LINE ABOVE REAR AXLE, WHICH HAD BEEN REPLACED ON 2012).

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(2 earlier editions of this document folded here)

    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.

Known issuesCastech cylinder head porosity crack (gradual coolant loss)1

  1. Manufacturer communication2001–2006 GMC YUKON XL DENALI ・ 2024-03-19

    Internal Coolant Leak from Cylinder Head Location

    1. 1Fault

      • Some vehicles may experience a gradual coolant loss over time.

    2. 2Finding the cause

      Possible causes

      • A very low percentage of cylinder heads manufactured with an embossed Castech logo may develop a porosity crack in a very specific area.

      Steps to confirm (in the document’s order)

      1. Check whether the head is a Castech casting by looking for the casting logo on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head.
      2. If the head is a Castech casting, inspect the area around the five oil drain holes for witness marks indicating coolant seepage over time.
      3. The crack can be in any of the five cylinder head oil drains and shows as a clean or shiny area on an otherwise stained surface.
      4. Pressurizing the cooling system at this time may reveal coolant, air, or a combination weeping in the described area.

    3. 3Correction

      Repair

      • If inspection reveals evidence of coolant witness marks, replace the entire cylinder head assembly.

      Caution

      • If the cylinder heads are not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.
      • If no evidence of coolant loss is found on inspection of Castech casting cylinder heads, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2001-2006 GMC Envoy, Jimmy, Sierra and Yukon models, among other listed GM models, with the 4.8L, 5.3L or 5.7L VORTEC GEN III, GEN IV V8 engine.
    • Condition：Some vehicles may experience a gradual coolant loss over time.
    • Cause：A very low percentage of cylinder heads manufactured with an embossed Castech logo may develop a porosity crack in a very specific area.
    • Confirm：Check whether the head is a Castech casting by looking for the casting logo on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head.
    • Confirm：If the head is a Castech casting, inspect the area around the five oil drain holes for witness marks indicating coolant seepage over time.
    • Confirm：The crack can be in any of the five cylinder head oil drains and shows as a clean or shiny area on an otherwise stained surface.
    • Confirm：Pressurizing the cooling system at this time may reveal coolant, air, or a combination weeping in the described area.
    • Repair：If inspection reveals evidence of coolant witness marks, replace the entire cylinder head assembly.
    • Caution：If the cylinder heads are not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.
    • Caution：If no evidence of coolant loss is found on inspection of Castech casting cylinder heads, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.

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

    Remedy
    This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.

Known issuesFuel module reservoir assembly: fuel pump wire connectors may overheat - recall 05V-1551

  1. Recall2001 GMC YUKON XL ・ —

    Fuel Module Reservoir Assembly Overheating Recall

    1. 1Fault

      • Some vehicles were built with fuel module reservoir assemblies whose fuel pump wires and/or connectors may overheat under certain operating conditions.
      • If the exposed ignition circuit wire shorts to ground, the fuel pump fuse blows, disabling the fuel pump and causing an engine stall or no-start; if the ignition circuit or ground wire shorts to the fuel level sender card wires, fuel level readings may be inaccurate.
      • If enough heat reaches the pass-through connector, a hole may form in it, which may turn on the Service Engine Soon light during the emission system diagnostics routine; fuel vapor, and in some cases liquid fuel, may leak from the tank through the hole.
      • If enough fuel leaked out and an ignition source were present, a vehicle fire could occur.

    2. 2Finding the cause

      Possible causes

      • Fretting corrosion caused by vibration inside the tank was identified as the cause of high resistance within the fuel pump connector.

    3. 3Correction

      Repair

      1. Dealers remove the fuel tank, remove the fuel module reservoir assembly and install a new service kit, which includes a new pass-through connector and a wiring harness for the fuel pump and fuel sender card.
      2. Start by disconnecting the negative battery cable, then remove and discard the "ECM B" fuse.
      3. In the revised bulletin, the fuel and EVAP pipes are capped with J 41413-300, EVAP Cap/Plug Kit, to prevent fuel system contamination.
      4. Remove the 4 pin Metri Pack 150 electrical connector from the vehicle's body harness.
      5. Connect the new GT280 connector to the vehicle's body harness with the 4 butt splice connectors contained in the kit.
      2 more points

      Parts

      • Part number 15824379, Harness Kit, F/Tnk F/Pmp Mdl Wrg, quantity 1 per vehicle.

      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

      • Do not handle the fuel sender assembly by the fuel pipes; the leverage could damage the joints.
      • Always replace the fuel sender gasket when reinstalling the fuel sender assembly, to reduce the risk of fire and injury from a fuel leak.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The recall covers certain 2000-2001 Chevrolet 1500 Series Suburban and GMC 1500 Series Yukon XL vehicles built within the listed VIN breakpoints.
    • Condition：Some vehicles were built with fuel module reservoir assemblies whose fuel pump wires and/or connectors may overheat under certain operating conditions.
    • Condition：If the exposed ignition circuit wire shorts to ground, the fuel pump fuse blows, disabling the fuel pump and causing an engine stall or no-start; if the ignition circuit or ground wire shorts to the fuel level sender card wires, fuel level readings may be inaccurate.
    • Condition：If enough heat reaches the pass-through connector, a hole may form in it, which may turn on the Service Engine Soon light during the emission system diagnostics routine; fuel vapor, and in some cases liquid fuel, may leak from the tank through the hole.
    • Condition：If enough fuel leaked out and an ignition source were present, a vehicle fire could occur.
    • Cause：Fretting corrosion caused by vibration inside the tank was identified as the cause of high resistance within the fuel pump connector.
    • Repair：Dealers remove the fuel tank, remove the fuel module reservoir assembly and install a new service kit, which includes a new pass-through connector and a wiring harness for the fuel pump and fuel sender card.
    • Parts：Part number 15824379, Harness Kit, F/Tnk F/Pmp Mdl Wrg, quantity 1 per vehicle.
    • Repair：Start by disconnecting the negative battery cable, then remove and discard the "ECM B" fuse.
    • Repair：In the revised bulletin, the fuel and EVAP pipes are capped with J 41413-300, EVAP Cap/Plug Kit, to prevent fuel system contamination.
    • Caution：Do not handle the fuel sender assembly by the fuel pipes; the leverage could damage the joints.
    • Caution：Always replace the fuel sender gasket when reinstalling the fuel sender assembly, to reduce the risk of fire and injury from a fuel leak.
    • Repair：Remove the 4 pin Metri Pack 150 electrical connector from the vehicle's body harness.
    • Repair：Connect the new GT280 connector to the vehicle's body harness with the 4 butt splice connectors contained in the kit.
    • Repair：Install the fuel tank strap attaching bolts and tighten them to 40 N·m (30 lb ft).
    • Repair：Install the new fuel pump fuse contained in the kit into the vehicle's electrical center (ECM B).
    Cause
    CERTAIN TRUCKS AND SPORT UTILITY VEHICLES WERE BUILT WITH FUEL MODULE RESERVOIR ASSEMBLIES THAT CONTAIN FUEL PUMP WIRES CONNECTORS MAY OVERHEAT UNDER CERTAIN OPERATING CONDITIONS.
    Remedy
    DEALERS WILL REMOVE THE FUEL TANK, AND REMOVE THE MODULE RESERVOIR ASSEMBLIES FROM THE TANK, AND INSTALL A NEW SERVICE KIT FREE OF CHARGE. AN INTERIM LETTER TO OWNERS WAS MAILED ON MAY 25, 2005. THE OWNERS WERE RE-NOTIFIED ON OCTOBER 19, 2005, SINCE PARTS ARE NOW AVAILABE. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438 AND GMC AT 1-866-996-9463.
    Consequence
    IF THE IGNITION CIRCUIT WIRE IS EXPOSED, THE FUEL PUMP FUSE WILL BLOW, DISABLING THE FUEL PUMP AND CAUSING AN ENGINE STALL OR NO-START CONDITION. IF SUFFICIENT HEAT IS CONDUCTED TO THE PASS-THROUGH CONNECTOR, A HOLE IN THE CONNECTOR MAY RESULT, WHICH MAY CAUSE A 'SERVICE ENGINE SOON' LIGHT TO BE ILLUMINATED DURING THE EMISSION SYSTEM DIAGNOSTIC ROUTINE. FUEL VAPOR AND IN SOME CASES LIQUID FUEL MAY LEAK OUT OF THE FUEL TANK THROUGH THE HOLE IN THE CONNECTOR BODY. FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, COULD RESULT IN A FIRE. ALSO IF THE IGNITION CIRCUIT OR GROUND WIRE IS EXPOSED AND SHORTS TO THE FUEL LEVEL SENDER CARD WIRES, INACCURATE FUEL LEVEL READINGS MAY RESULT.

ENGINE AND ENGINE COOLING5

  1. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2023-04-12(4 earlier editions of this document folded here)

    ACDelco Spin-On Oil Filter Torque Specification Notification

    1. 1Fault

      • An oil leak from underneath the front of the vehicle after an earlier oil service; the leak can take several thousand miles to appear.

    2. 2Finding the cause

      Possible causes

      • The oil may be leaking from between the oil filter gasket and the mounting surface.

      Steps to confirm (in the document’s order)

      • The filter may be very easy to remove, sometimes by hand.

    3. 3Correction

      Repair

      1. Lubricate the new oil filter gasket with clean engine oil.
      2. Install the oil filter 1 full turn after the gasket contacts the sealing surface on the filter mounting flange.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all passenger cars and trucks, model years 2000 to 2024.
    • Condition：An oil leak from underneath the front of the vehicle after an earlier oil service; the leak can take several thousand miles to appear.
    • Cause：The oil may be leaking from between the oil filter gasket and the mounting surface.
    • Confirm：The filter may be very easy to remove, sometimes by hand.
    • Repair：Lubricate the new oil filter gasket with clean engine oil.
    • Repair：Install the oil filter 1 full turn after the gasket contacts the sealing surface on the filter mounting flange.

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

    Remedy
    This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.

  2. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2023-01-06(2 earlier editions of this document folded here)

    EVAP Leak Diagnostic Service Bulletin (DTCs P0442/P0455)

    1. 1Fault

      • The MIL is illuminated, and DTC P0442 (EVAP small leak detected) and/or P0455 (EVAP large leak detected) may be set in the ECM.

    2. 2Finding the cause

      Possible causes

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

      Steps to confirm (in the document’s order)

      1. Inspect every purge connection for proper installation, and look along the lines for damage or wear; if damage is seen, confirm it with the smoke test.
      2. Some leaks show only under pressure and some only under vacuum, so check both ways; cycling the purge and vent solenoids with GDS2 while inspecting may show a sticking valve.
      3. Critical connections to check include: purge tube to purge valve (at the intake manifold), purge tube to chassis EVAP line (rear of the engine, near the transmission), chassis EVAP line to canister, and fuel tank load line to canister.
      4. Also check the vent valve line at the vent valve, the fuel tank load line jumper connection near the fuel tank, and that the fuel tank cap is closed properly.
      5. If all connections are good, check the vent valve for a stuck-open position; if the vent valve works correctly, go on to the purge valve.
      1 more points

    3. 3Correction

      Parts

      • No parts are required for this repair.

      Caution

      • For diagnostic instructions, DTC information and required tools, always follow the service information document for the vehicle and DTC being worked on.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：This bulletin only applies to vehicles with gasoline engines.
    • Condition：The MIL is illuminated, and DTC P0442 (EVAP small leak detected) and/or P0455 (EVAP large leak detected) may be set in the ECM.
    • Cause：P0455 sets because of a large leak or a purge blockage: an unseated tube connection, a damaged tube, a canister vent valve stuck open, or a purge valve stuck closed.
    • Cause：P0442 sets because of a small leak, which can come from a purge valve stuck open or a canister vent valve stuck open.
    • Confirm：Inspect every purge connection for proper installation, and look along the lines for damage or wear; if damage is seen, confirm it with the smoke test.
    • Confirm：Some leaks show only under pressure and some only under vacuum, so check both ways; cycling the purge and vent solenoids with GDS2 while inspecting may show a sticking valve.
    • Confirm：Critical connections to check include: purge tube to purge valve (at the intake manifold), purge tube to chassis EVAP line (rear of the engine, near the transmission), chassis EVAP line to canister, and fuel tank load line to canister.
    • Confirm：Also check the vent valve line at the vent valve, the fuel tank load line jumper connection near the fuel tank, and that the fuel tank cap is closed properly.
    • Confirm：If all connections are good, check the vent valve for a stuck-open position; if the vent valve works correctly, go on to the purge valve.
    • Confirm：Work in this order: EVAP lines properly installed and fully seated; damage on the EVAP lines; vent valve malfunction; purge valve malfunction.
    • Parts：No parts are required for this repair.
    • Caution：For diagnostic instructions, DTC information and required tools, always follow the service information document for the vehicle and DTC being worked on.

    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.

  3. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2022-09-07

    MIL Illuminated with Fuel Trim and Oxygen Sensor Codes

    1. 1Fault

      • Customers may comment that the MIL is illuminated.
      • Initial diagnosis may show fuel trim and O2 sensor related codes including P0101, P0137, P0138, P0140, P0141, P0157, P0158, P0160 and P0161.
      • The listed codes also include P0171, P0174, P0420, P0430, P1174 and P1175.

    2. 2Finding the cause

      Possible causes

      • These methods find small leaks around the O2 sensor embossments and slight cracks in an intake plenum or gasket.

      Steps to confirm (in the document’s order)

      1. If normal SI diagnostics do not lead to a resolution and an intake vacuum leak or exhaust leak is suspected, use the GE-52250 Variable Pressure Leak Detector (preferred), the J-41416 ultrasonic leak tester, or possibly soapy water with low pressure air into the tailpipe to find the leak.
      2. For an intake leak, introduce the smoke into the brake booster hose or the oil dipstick tube; soapy water can be sprayed near the gasket, seams and all vacuum nipples.
      3. For an exhaust leak, put the hose with smoke or air into the tailpipe sealed with shop towels, then spray soapy water around seals, seams and bosses.

    3. 3Correction

      Parts

      • No parts are required for this repair.

      Caution

      • All of these tests are much more effective if the throttle body is covered or sealed.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to Buick, Cadillac, Chevrolet and GMC passenger cars and trucks, model years 2000 to 2022, gasoline engines only.
    • Condition：Customers may comment that the MIL is illuminated.
    • Condition：Initial diagnosis may show fuel trim and O2 sensor related codes including P0101, P0137, P0138, P0140, P0141, P0157, P0158, P0160 and P0161.
    • Condition：The listed codes also include P0171, P0174, P0420, P0430, P1174 and P1175.
    • Confirm：If normal SI diagnostics do not lead to a resolution and an intake vacuum leak or exhaust leak is suspected, use the GE-52250 Variable Pressure Leak Detector (preferred), the J-41416 ultrasonic leak tester, or possibly soapy water with low pressure air into the tailpipe to find the leak.
    • Caution：All of these tests are much more effective if the throttle body is covered or sealed.
    • Confirm：For an intake leak, introduce the smoke into the brake booster hose or the oil dipstick tube; soapy water can be sprayed near the gasket, seams and all vacuum nipples.
    • Confirm：For an exhaust leak, put the hose with smoke or air into the tailpipe sealed with shop towels, then spray soapy water around seals, seams and bosses.
    • Cause：These methods find small leaks around the O2 sensor embossments and slight cracks in an intake plenum or gasket.
    • Parts：No parts are required for this repair.

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

    Remedy
    This bulletin provides information on tools available to find an intake vacuum leak or exhaust leak to correct a condition of MIL Illuminated with Multiple Fuel Trim and/or Oxygen Sensor Codes Set.

  4. Manufacturer communication2000–2006 GMC YUKON XL ・ 2019-03-18

    Diagnostic Tip: Using Smoke Machine and Ultrasonic Detector for Air Leaks

    1. 1Fault

      • The SES light is on, and initial diagnosis may show fuel trim and/or O2 sensor related codes such as P0171, P0174, P0420 and P0430.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. If normal SI diagnostics do not resolve it and an intake vacuum leak or exhaust leak is suspected, the J41413-200 Evaporative System Tester smoke machine, the J-41416 ultrasonic leak tester, or soapy water with low pressure air into the tailpipe may help find the leak.
      2. For an intake leak, the smoke can be introduced into the brake booster hose or the oil dipstick tube.
      3. Soapy water can be sprayed near the gasket and seams and on all vacuum nipples.
      4. For an exhaust leak, a hose into the tailpipe carrying smoke or air, sealed with shop towels, is effective.
      5. Then spray soapy water around the seals, seams and bosses.
      1 more points

    3. 3Correction

      Caution

      • All of these tests are much more effective if the throttle body is covered/sealed.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all 2000 - 2019 models with gasoline engines.
    • Condition：The SES light is on, and initial diagnosis may show fuel trim and/or O2 sensor related codes such as P0171, P0174, P0420 and P0430.
    • Confirm：If normal SI diagnostics do not resolve it and an intake vacuum leak or exhaust leak is suspected, the J41413-200 Evaporative System Tester smoke machine, the J-41416 ultrasonic leak tester, or soapy water with low pressure air into the tailpipe may help find the leak.
    • Caution：All of these tests are much more effective if the throttle body is covered/sealed.
    • Confirm：For an intake leak, the smoke can be introduced into the brake booster hose or the oil dipstick tube.
    • Confirm：Soapy water can be sprayed near the gasket and seams and on all vacuum nipples.
    • Confirm：For an exhaust leak, a hose into the tailpipe carrying smoke or air, sealed with shop towels, is effective.
    • Confirm：Then spray soapy water around the seals, seams and bosses.
    • Confirm：These methods are very good for finding small leaks around the O2 sensor bosses and slight cracks in an intake plenum or gasket.

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

    Remedy
    This preliminary information document communicates a tip on the way to diagnose possible induction or exhaust air leaks using the evaporative emission cart smoke machine and ultrasonic leak detector tools.

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

    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.

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.

EQUIPMENT1

  1. Manufacturer communication2000–2006 GMC YUKON XL ・ 2018-06-11(3 earlier editions of this document folded here)

    GM Products for Eliminating Vehicle Odors

    1. 1Fault

      • GM Vehicle Care Odor Eliminator has been shown to greatly reduce or remove mold and mildew smells resulting from vehicle water leaks, as well as customer created odors such as smoke.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      • First confirm that all water leaks have been repaired and determine which areas were water soaked or wet; components with visible mold/mildew staining should be replaced.

    3. 3Correction

      Repair

      1. If the interior is removed, treat the floor pan and primed/painted surfaces with a bleach/soap solution, rinse with clean water and dry.
      2. For hard surfaces, add 8 oz. of GM Vehicle Care Odor Eliminator (1 cup) to dish soap in a spray bottle and top off the bottle with tap water.
      3. Treat all carpeting and upholstered seats lightly to moderately with the formula at full strength, using a wide fan spray setting.
      4. For the ventilation system, start the vehicle, turn the fan on high cool (not the A/C setting), and spray the formula (10 trigger pulls) into the outside fresh air intake vent at the cowl.

      Parts

      • Part number 88861431 (in Canada, 88861436): GM Vehicle Care Odor Eliminator, 32 oz (946 mL) non-aerosol bottle.

      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

      • Do not let the product come into contact with vinegar or any acidic substance.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2015 and prior GM passenger cars and trucks.
    • Condition：GM Vehicle Care Odor Eliminator has been shown to greatly reduce or remove mold and mildew smells resulting from vehicle water leaks, as well as customer created odors such as smoke.
    • Caution：Do not let the product come into contact with vinegar or any acidic substance.
    • Confirm：First confirm that all water leaks have been repaired and determine which areas were water soaked or wet; components with visible mold/mildew staining should be replaced.
    • Repair：If the interior is removed, treat the floor pan and primed/painted surfaces with a bleach/soap solution, rinse with clean water and dry.
    • Repair：For hard surfaces, add 8 oz. of GM Vehicle Care Odor Eliminator (1 cup) to dish soap in a spray bottle and top off the bottle with tap water.
    • Repair：Treat all carpeting and upholstered seats lightly to moderately with the formula at full strength, using a wide fan spray setting.
    • Repair：For the ventilation system, start the vehicle, turn the fan on high cool (not the A/C setting), and spray the formula (10 trigger pulls) into the outside fresh air intake vent at the cowl.
    • Parts：Part number 88861431 (in Canada, 88861436): GM Vehicle Care Odor Eliminator, 32 oz (946 mL) non-aerosol bottle.

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

    Remedy
    This informational bulletin provides information on what products GM has to aid in the eliminating unwanted odors in a vehicle.

EXTERIOR LIGHTING1

  1. Manufacturer communication2000–2006 GMC YUKON XL DENALI ・ 2023-02-28(1 earlier editions of this document folded here)

    Exterior Lamp Condensation and Water Leaks Service Bulletin

    1. 1Fault

      • Exterior lamps such as cornering, turn signal, backup, head or tail lamps may show very small water droplets, a fine mist or white fog (condensation) on the inside of the lens.

    2. 2Finding the cause

      Possible causes

      • Condensation occurs when the air inside the lamp assembly reaches the dew point through atmospheric changes.
      • Non-OE lamps are most often presented as holding moisture or with inoperative bulbs from corroded electrical connections; they appear to be installed as part of a collision repair.

      Steps to confirm (in the document’s order)

      1. Normal: the mist is located mainly in the lens corners near the vents and does not cover more than half the lens surface.
      2. Normal: the moisture clears when the vehicle is parked in a dry environment or driven with the lights on.
      3. Leak: water has accumulated in the bottom of the lamp assembly.
      4. Leak: the condition will not clear when the vehicle is parked in a dry environment or driven with the lights on.

    3. 3Correction

      Repair

      • A condition covering more than half the surface of the lamp lens indicates the need to service the lens or lamp assembly.

      Caution

      • Depending on the lamp and the atmospheric conditions, the time needed to clear the lamp may vary from 2 to 6 hours.
      • If the normal conditions are noted, advise the customer that replacing the lamp assembly may not correct the condition.
      • Moisture that "comes and goes" is considered a normal condition.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2023 and prior GM passenger cars and trucks, including medium duty trucks and excluding LCF medium duty trucks.
    • Condition：Exterior lamps such as cornering, turn signal, backup, head or tail lamps may show very small water droplets, a fine mist or white fog (condensation) on the inside of the lens.
    • Cause：Condensation occurs when the air inside the lamp assembly reaches the dew point through atmospheric changes.
    • Caution：Depending on the lamp and the atmospheric conditions, the time needed to clear the lamp may vary from 2 to 6 hours.
    • Confirm：Normal: the mist is located mainly in the lens corners near the vents and does not cover more than half the lens surface.
    • Confirm：Normal: the moisture clears when the vehicle is parked in a dry environment or driven with the lights on.
    • Caution：If the normal conditions are noted, advise the customer that replacing the lamp assembly may not correct the condition.
    • Repair：A condition covering more than half the surface of the lamp lens indicates the need to service the lens or lamp assembly.
    • Confirm：Leak: water has accumulated in the bottom of the lamp assembly.
    • Confirm：Leak: the condition will not clear when the vehicle is parked in a dry environment or driven with the lights on.
    • Caution：Moisture that "comes and goes" is considered a normal condition.
    • Cause：Non-OE lamps are most often presented as holding moisture or with inoperative bulbs from corroded electrical connections; they appear to be installed as part of a collision repair.

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

    Remedy
    This service bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Water Leaks and Replacement Guidelines.

FUEL SYSTEM, GASOLINE1

  1. Manufacturer communication2000–2006 GMC YUKON XL ・ 2021-04-19(5 earlier editions of this document folded here)

    Engine Block Cylinder Bore Damage Information

    1. 1Fault

      • The block is suspected of cylinder bore damage, scoring or out of round as the cause of oil consumption, misfire, cylinder leakage or blow by.

    2. 2Finding the cause

      Possible causes

      • If a catalytic converter fails and the brick breaks, its dust can be drawn back into the engine.

      Steps to confirm (in the document’s order)

      1. The peak to valley spec for crosshatch is .65-2.8 microns; any deviation and the crosshatch will be gone.
      2. Cylinder damage or scoring: the walls have grooves deep enough to catch with a finger nail.
      3. If there is crosshatch all the way around the bore from top to bottom, the bore is not out of round.
      4. Dirt intrusion: with a compromised filtering system the bores look lightly sand blasted, and the crosshatch is faint with no sharpness.
      5. A block with this converter-dust failure has bores that look sand blasted.

    3. 3Correction

      Repair

      • If not caught early there will be no crosshatch and the engine will need to be replaced.

      Caution

      • GM has not had an issue with cylinders being machined out of round for any engine family in recent history.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to all brands and models, model years 2000 - 2021.
    • Condition：The block is suspected of cylinder bore damage, scoring or out of round as the cause of oil consumption, misfire, cylinder leakage or blow by.
    • Caution：GM has not had an issue with cylinders being machined out of round for any engine family in recent history.
    • Confirm：The peak to valley spec for crosshatch is .65-2.8 microns; any deviation and the crosshatch will be gone.
    • Confirm：Cylinder damage or scoring: the walls have grooves deep enough to catch with a finger nail.
    • Confirm：If there is crosshatch all the way around the bore from top to bottom, the bore is not out of round.
    • Confirm：Dirt intrusion: with a compromised filtering system the bores look lightly sand blasted, and the crosshatch is faint with no sharpness.
    • Cause：If a catalytic converter fails and the brick breaks, its dust can be drawn back into the engine.
    • Confirm：A block with this converter-dust failure has bores that look sand blasted.
    • Repair：If not caught early there will be no crosshatch and the engine will 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 engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.

FUEL SYSTEM, OTHER1

  1. Owner complaint2001 GMC YUKON XL 2500 ・ 2009-10-08

    Gas leaking from underneath vehicle, fuel pump assembly fuel nipple

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Fault
    WAS DRIVING VEHICLE, STOPPED VEHICLE, NOTICED THAT GAS WAS LEAKING FROM UNDERNEATH THE VEHICLE.
    Cause
    THIS WAS NOT DUE TO WEAR AND TEAR. (1 more)
    Remedy
    ENTIRE ASSEMBLY HAD TO BE REPLACED.

STRUCTURE1

  1. Owner complaint2001 GMC YUKON XL 1500 ・ 2009-06-02

    Roof leaks when raining

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    THE CONTACT STATED THAT THE ROOF OF THE VEHICLE LEAKS WHENEVER IT RAINS.
    Cause
    THE ROOF IS LEAKING FROM THE FACTORY MADE ROOF RACK BECAUSE IT IS CORRODED AND CREATED A HOLE.
    Consequence
    AS A RESULT, HIS FAMILY BECOMES ILL WHEN THE FAILURE OCCURS.

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