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Selected vehicle: 2006 · GMC Yukon XL Denali

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Source reference 10182545

Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerENGINE AND ENGINE COOLING

Relation to the target vehicle

  • The source's vehicle field includes the trim.
Model year
Match 2006 — Source vehicle field
Model
Match YUKON DENALI XL — Source vehicle field
Trim
Match Denali — Source vehicle field

What the manufacturer’s document says

PIP5628C ・ fault and correction ・ for GM vehicles in general

Applies to

  • Applies to all brands, models and engines, 2000 - 2021.

    the passage
    All All 2000 - 2021 All All All All

Fault

  • The vehicle has a misfire with DTCs P0300 - P0308 and/or P050D set.

    the passage
    A vehicle may come in with a misÕre and DTCs P0300 - P0308 and/or P050D set.

Finding the cause

Steps to confirm (in the document’s order)

  1. Establish whether the misfire can be felt; if it cannot, remove the accessory drive belt if possible and evaluate.

    the passage
    Can the misÕres be felt? If not felt remove the accessory drive belt if possible and evaluate.

  2. Perform the fuel injector balance test and record the results.

    the passage
    2. Fuel injector balance test (record the results)

  3. Check for a possible fuel quality issue, especially with a cold engine hard start and/or a misfire on all cylinders.

    the passage
    3. Check for a possible fuel quality issue (especially if there is an issue of cold engine hard start and/ or an engine misÕre on all cylinders).

  4. Check the ignition supply voltage to the ignition module/coil assemblies and to the fuel injectors.

    the passage
    4. Check the supply ignition voltage to the ignition module/coil assemblies, and also to the fuel injectors

  5. Complete a compression test, static and running, and record the results.

    the passage
    5. Complete a Compression test, static and running (record the results)

  6. Complete a cylinder leakage test if needed and record the results.

    the passage
    6. Complete a Cylinder leakage test if needed (record the results)

  7. Note whether the fuel trims are rich or lean.

    the passage
    7. Note the fuel trims. (rich or lean)

  8. Inspect the spark plugs for anything abnormal.

    the passage
    Complete a Spark plug inspection ( inspect for anything abnormal)

  9. Swap components from the misfiring cylinder to known good locations.

    the passage
    Did you swap components from the misÕring cylinder to known good locations?

  10. Confirm that a crankshaft variation learn has been completed.

    the passage
    Have you completed a crankshaft variation learn?

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

  1. Communication summary

    本予備情報は、ミスファイアおよびDTCコードP0300～P0308および/またはP050Dを伴った状態で車両が来店した場合、診断を支援するためにTACに提供する必要がある情報について通知するものです。 Machine translation (unreviewed)

    This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
    Go to this passage in the original

Source

Source
NHTSA Manufacturer Communications
Source reference
10182545
Received by source
2020-11-16
Incident date
Unknown

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