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GMC Yukon XL 2000–2006

GMC Yukon XLModel years 2000–2006

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Common on this vehicle:Leak

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

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2 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.

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

  1. Manufacturer communication2002–2006 GMC YUKON XL ・ 2017-08-15(1 earlier editions of this document folded here)

    Oil Leak at Cold Start in Low Ambient Temperature

    1. 1Fault

      • An oil leak may appear shortly after a cold start in extremely low ambient temperatures (approximately below 10*F) or with excessive short trip drive cycles.

    2. 2Finding the cause

      Possible causes

      • An oil leak from the rear main seal is the result of a frozen PCV system and excessive crankcase pressure.

    3. 3Correction

      Repair

      • Clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430 (vented oil fill cap) to prevent a reoccurrence.

      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

      • Oil fill cap part number 12589430 (vented oil fill cap).

      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.

    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2002-2014 GMC Yukon, Yukon XL, Yukon Denali and Yukon XL Denali.
    • Applies to：Applies to vehicles with a V-8 gas engine except L83, L86 and LV3.
    • Condition：An oil leak may appear shortly after a cold start in extremely low ambient temperatures (approximately below 10*F) or with excessive short trip drive cycles.
    • Cause：An oil leak from the rear main seal is the result of a frozen PCV system and excessive crankcase pressure.
    • Repair：Clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430 (vented oil fill cap) to prevent a reoccurrence.
    • Parts：Oil fill cap part number 12589430 (vented oil fill cap).

    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 oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.

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