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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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2 conditions added

Common on this vehicle:LeakNoiseSmoke or fireWarning lightGauge or instrument faultHard start or long crankMisfire or rough idleDoes not start

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15 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

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 (12)

Known issuesP0420 / P0430 on a new or just-replaced catalytic converter (break-in not completed)1

  1. Manufacturer communication2002–2006 GMC YUKON DENALI ・ 2019-04-08

    Service Engine Soon Lamp at Low Mileage

    1. 1Fault

      • An SES light may come on on low mileage vehicles or vehicles that recently had the catalytic converter replaced, with DTCs P0420 and/or P0430 stored.

    2. 2Finding the cause

      Possible causes

      • On a new vehicle, catalytic converter efficiency DTCs P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter.
      • If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing.
      • If the DTCs set shortly after the catalytic converter is replaced, it may be because the engine run time restrictions are no longer in place since the vehicle is no longer new.
      • As a result, the catalytic converter may not have completed a thorough break-in cycle after replacement, possibly resulting in a false DTC P0420 and/or P0430.

      Steps to confirm (in the document’s order)

      1. On a new/low mileage vehicle with these DTCs, use the Tech 2 to verify engine run time on the Engine Hour Meter in the IPC Data Display/Data 1 List.
      2. Finally, restart the engine and operate the vehicle at the conditions for running the DTC P0420/430 tests, and make sure the vehicle passes them.

    3. 3Correction

      Repair

      1. Clear the DTCs and perform the drive cycle given in the document.
      2. Drive cycle step: drive the vehicle at sustained highway speed for 25 to 30 minutes.
      3. Drive cycle step: restart the engine and resume highway speed for an additional 10 to 15 minutes.
      4. If the diagnostics do not pass, perform SI diagnostics and repair as necessary.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to GMC Yukon models, 2002 - 2018, with a V8 engine.
    • Condition：An SES light may come on on low mileage vehicles or vehicles that recently had the catalytic converter replaced, with DTCs P0420 and/or P0430 stored.
    • Cause：On a new vehicle, catalytic converter efficiency DTCs P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter.
    • Confirm：On a new/low mileage vehicle with these DTCs, use the Tech 2 to verify engine run time on the Engine Hour Meter in the IPC Data Display/Data 1 List.
    • Cause：If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing.
    • Cause：If the DTCs set shortly after the catalytic converter is replaced, it may be because the engine run time restrictions are no longer in place since the vehicle is no longer new.
    • Cause：As a result, the catalytic converter may not have completed a thorough break-in cycle after replacement, possibly resulting in a false DTC P0420 and/or P0430.
    • Repair：Clear the DTCs and perform the drive cycle given in the document.
    • Repair：Drive cycle step: drive the vehicle at sustained highway speed for 25 to 30 minutes.
    • Repair：Drive cycle step: restart the engine and resume highway speed for an additional 10 to 15 minutes.
    • Confirm：Finally, restart the engine and operate the vehicle at the conditions for running the DTC P0420/430 tests, and make sure the vehicle passes them.
    • Repair：If the diagnostics do not pass, perform SI diagnostics and repair as 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 on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster  Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.

Known issuesOil leak after cold start from frozen PCV system (rear main seal)1

  1. Manufacturer communication2002–2006 GMC YUKON ・ 2008-04-07

    Engine Oil Leak Due to PCV Freeze-Up

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      POSSIBLE ENGINE OIL LEAK DUE TO PCV FREEZE-UP, EQUIPPED WITH THE 4.8, 5.3, 6.0, AND 6.2 V-8 ENGINES. *NJ

      What the documents say to do

      Oil leak after cold start from frozen PCV system (rear main seal)

      Repair

      1. Clean the area of the leak and clean and dry the PCV hoses.
      2. Fit oil fill cap 12589430 (vented) to prevent a recurrence.
    Read the sentences of the record
    Remedy
    POSSIBLE ENGINE OIL LEAK DUE TO PCV FREEZE-UP, EQUIPPED WITH THE 4.8, 5.3, 6.0, AND 6.2 V-8 ENGINES. *NJ

ENGINE AND ENGINE COOLING10

  1. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2019-07-01

    Fuel Injection Kit for Intake Valve Decarbonizing Information

    1. 1Fault

      • Rough idle, crank no start, extended crank or misfire, with the engine warning lamp on and DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 set.
      • When the engine is cold, compression on multiple cylinders may be zero.
      • The engine may pop through the intake or exhaust while cranking, and the spark plugs may be fuel fouled.

    2. 2Finding the cause

      Possible causes

      • Major carbon build-up on the intake and/or exhaust valves from fuel contamination or incomplete burning of the fuel; misfires should not appear before at least 8,000 km (5,000 mi).

    3. 3Correction

      Repair

      1. If there is no valve damage and no cam follower out of place, perform the cleaning procedure to free sticking valves and remove carbon from the valves and pistons.
      2. If valves are damaged or cam followers are out of place, make the engine mechanical repairs first and then perform the cleaning procedure to prevent a return.
      3. Fill Cleaner Kit J-35800-A with about 473 ml (16 oz) of Top Engine Cleaner and set the air pressure at the tool to 260 kPa (40 psi).
      4. With GDS 2 or a scan tool, command engine idle to 2000 rpm so the engine does not stall.
      5. With the engine at operating temperature in a well-ventilated area, slowly and carefully induce the cleaner into the engine, taking about 3 minutes.

      Parts

      • ACDelco Top Engine Cleaner is 19355198 (in Canada, P/N 19355199).

      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

      • Inducing too much cleaner at too low an RPM, or stalling the engine with too much cleaner at once, may hydro-lock the engine and bend a connecting rod.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to GM passenger cars and trucks with gasoline engines only, model years 2000 to 2019.
    • Condition：Rough idle, crank no start, extended crank or misfire, with the engine warning lamp on and DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 set.
    • Condition：When the engine is cold, compression on multiple cylinders may be zero.
    • Condition：The engine may pop through the intake or exhaust while cranking, and the spark plugs may be fuel fouled.
    • Cause：Major carbon build-up on the intake and/or exhaust valves from fuel contamination or incomplete burning of the fuel; misfires should not appear before at least 8,000 km (5,000 mi).
    • Repair：If there is no valve damage and no cam follower out of place, perform the cleaning procedure to free sticking valves and remove carbon from the valves and pistons.
    • Repair：If valves are damaged or cam followers are out of place, make the engine mechanical repairs first and then perform the cleaning procedure to prevent a return.
    • Caution：Inducing too much cleaner at too low an RPM, or stalling the engine with too much cleaner at once, may hydro-lock the engine and bend a connecting rod.
    • Repair：Fill Cleaner Kit J-35800-A with about 473 ml (16 oz) of Top Engine Cleaner and set the air pressure at the tool to 260 kPa (40 psi).
    • Repair：With GDS 2 or a scan tool, command engine idle to 2000 rpm so the engine does not stall.
    • Repair：With the engine at operating temperature in a well-ventilated area, slowly and carefully induce the cleaner into the engine, taking about 3 minutes.
    • Parts：ACDelco Top Engine Cleaner is 19355198 (in Canada, P/N 19355199).

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

    Remedy
    This informational bulletin advises of a new fuel injection kit used for decarbonizing the intake valves, and explains how toptier fuels should be used to reduce carbon build up.

  2. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 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.

  3. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2018-05-07(3 earlier editions of this document folded here)

    Premature Catalytic Converter Failures – Preliminary Information

    1. 1Fault

      • The catalytic converter has come apart or has set P0420 and/or P0430.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. If the converter has failed with no apparent reason, inspect for a poor crimp at the circuit terminal on the engine bank with the concern.
      2. The grounds in question are those for the ignition system, fuel injector or the ECM.
      3. Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.

    3. 3Correction

      Repair

      • If no corrosion or damage is found, tighten the ground bolt to the proper torque.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2015 and prior GM cars and gasoline-powered light duty and HD trucks.
    • Condition：The catalytic converter has come apart or has set P0420 and/or P0430.
    • Confirm：If the converter has failed with no apparent reason, inspect for a poor crimp at the circuit terminal on the engine bank with the concern.
    • Confirm：The grounds in question are those for the ignition system, fuel injector or the ECM.
    • Confirm：Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.
    • Repair：If no corrosion or damage is found, tighten the ground bolt to the proper torque.

    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 gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.

  4. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 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.

  5. Manufacturer communication2003–2006 GMC YUKON ・ 2011-03-16

    Oil Consumption/Exhaust Smoke - PCV Baffle or Lifter Concern

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      BUICK/CADILLAC/CHEVROLET/GMC/HUMMER/PONTIAC/SAAB: OIL CONSUMPTION AND/OR EXHAUST SMOKE-POSSIBLE PCV BAFFLE OR LIFTER CONCERN. UPON INSPECTION, OBVIOUS OIL WILL BE FOUND IN THE INTAKE MANIFOLD AND/OR PCV VACUUM TUBE. *PE UPDATED 3/21/11. *PE UPDATED 5/9/11. *PE UPDATED 5/25/11. *PE UPDATED 06/16/2011. *KB UPDATED A SECOND TIME ON 06/16/2011. *KB UPDATED 6/27/11. *PE

    Read the sentences of the record
    Remedy
    BUICK/CADILLAC/CHEVROLET/GMC/HUMMER/PONTIAC/SAAB: OIL CONSUMPTION AND/OR EXHAUST SMOKE-POSSIBLE PCV BAFFLE OR LIFTER CONCERN. UPON INSPECTION, OBVIOUS OIL WILL BE FOUND IN THE INTAKE MANIFOLD AND/OR PCV VACUUM TUBE. *PE UPDATED 3/21/11. *PE UPDATED 5/9/11. *PE UPDATED 5/25/11. *PE UPDATED 06/16/2011. *KB UPDATED A SECOND TIME ON 06/16/2011. *KB UPDATED 6/27/11. *PE

  6. Manufacturer communication2003–2004 GMC YUKON ・ 2005-05-14

    Revised I/M EVAP System Set Procedure

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT

    Read the sentences of the record
    Remedy
    REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT

  7. Manufacturer communication2002–2005 GMC YUKON ・ 2005-01-31

    Resonance Noise at Idle

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      RESONANCE NOISE AT IDLE. *EH

    Read the sentences of the record
    Remedy
    RESONANCE NOISE AT IDLE. *EH

  8. Manufacturer communication2000–2005 GMC YUKON ・ 2004-11-04

    Catalytic Converter Replacement Engineering Investigation

    1. 1Fault

      Not stated

    2. 2Finding the cause

      Not stated

    3. 3Correction

      ENGINEERING INVESTIGATION - CATALYTIC CONVERTER REPLACEMENT. *SC

    Read the sentences of the record
    Remedy
    ENGINEERING INVESTIGATION - CATALYTIC CONVERTER REPLACEMENT. *SC

  9. Manufacturer communication2000–2004 GMC YUKON ・ 2004-03-04

    Exhaust System Popping/Snapping Noise When Hot

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      ADVANCE SERVICE INFORMATION - EXHAUST SYSTEM POPPING/SNAPPING NOISE WHEN VEHICLE IS HOT, AT IDLE OR IMMEDIATELY AFTER VEHICLE IS SHUT OFF. *TT BULLETIN 03-06-05-008, DATED 11/01/2003 REPLACED. *TT

    Read the sentences of the record
    Remedy
    ADVANCE SERVICE INFORMATION - EXHAUST SYSTEM POPPING/SNAPPING NOISE WHEN VEHICLE IS HOT, AT IDLE OR IMMEDIATELY AFTER VEHICLE IS SHUT OFF. *TT BULLETIN 03-06-05-008, DATED 11/01/2003 REPLACED. *TT

  10. Manufacturer communication2000–2003 GMC YUKON ・ 2003-03-27

    Exhaust/Muffler Heat Shield Rattle and Popping Noise

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      EXHAUST / MUFFLER HEAT SHIELD RATTLE, POPPING NOISE UNDER VEHICLE. *TT

    Read the sentences of the record
    Remedy
    EXHAUST / MUFFLER HEAT SHIELD RATTLE, POPPING NOISE UNDER VEHICLE. *TT

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