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

PIP5628 ・ fault and correction ・ for GM vehicles in general

Applies to

All models, model years 2000 - 2019.
the passage
All All 2000 - 2019 All All All All

Fault

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

Finding the cause

Steps to confirm (in the document’s order)

Do a fuel injector balance test and record the results.
the passage
Fuel injector balance test (record the results)
Find out what grade of fuel is in the tank and where it was last filled, especially if all cylinders misfire.
the passage
What grade of fuel and where was it last ﬁlled. (Especially if it is all cylinders).
Check the ignition supply voltage to the ignition module/coil assemblies and also to the fuel injectors.
the passage
Check the supply ignition voltage to the ignition module/coil assemblies, and also to the fuel injectors
Complete a compression test, static and running, and record the results.
the passage
Compression test, static and running (record the results)
Note the fuel trims (rich or lean).
the passage
Note the fuel trims. (rich or lean)
Inspect the spark plugs for anything abnormal.
the passage
Spark plug inspection ( inspect for anything abnormal)
Swap components from the misfiring cylinder to known good locations.
the passage
Did you swap components from the misﬁring cylinder to known good locations?
Complete a crankshaft variation learn.
the passage
Have you completed a crankshaft variation learn?
On V8/V6 push rod engines, inspect for and verify rocker arm movement.
the passage
Inspect for and verify rock er arm movement (V8/V6 push rod engines )

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

Communication summary
本予備情報は、失火およびDTCコードP0300-P0308および/またはP050Dを有する車両がサービスセンターに入庫した場合の診断を支援するためにTACに提供する必要がある情報を伝達します 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: 10154299
Received by source: 2019-03-11
Incident date: Unknown

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