Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerEQUIPMENT

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

04-06-01-029I ・ information ・ for GM vehicles in general

Applies to

Applies to 2018 and prior GM passenger cars and trucks.
the passage
2018 and Prior GM Passenger Cars and Trucks

Finding the cause

Possible causes

Some aftermarket crankcase flushing materials are incompatible with GM engine components and can damage some engine seals and bearings.
the passage
indicate incompatibility with GM engine components and the potential for damage to some engine seals and bearings.

Correction

Repair

Flushing of A/C lines, radiators, transmission coolers and power steering systems is a recognized practice after catastrophic failures or when extreme corrosion is found in radiators.
the passage
Flushing of air conditioning (A/C) lines, radiators, transmission coolers, and power steering systems are recognized practices to be performed after catastrophic failures or extreme corrosion when encountered in radiators.
Replace transmission fluid only by draining and refilling, following the procedures in Service Information (SI).
the passage
Transmission fluid should only be replaced by draining and refilling following procedures in Service Information (SI).
The Automatic Transmission Oil Cooler Flow Check and Flush Tool is recommended for GM vehicles.
the passage
The Automatic Transmission Oil Cooler Flow Check and Flush Tool IS recommended for GM vehicles.

Caution

Analyses of returned parts exposed to aftermarket flushes show indications of potential damage and shortened durability.
the passage
these aftermarket “flushes” show indications of potential damage and shortened durability.
GM does not endorse or recommend engine crankcase flushing for any of its gasoline engines.
the passage
General Motors Corporation does not endorse or recommend engine crankcase flushing for any of its gasoline engines.
Such flushing is not required or recommended for normal service operations.
the passage
This practice is not required or recommended for normal service operations.
External transmission fluid exchange or flush machines are not recommended for automatic or manual transmissions.
the passage
The use of external transmission fluid exchange or flush machines is not recommended for the automatic or manual transmission.

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
本情報通知は、車両のメンテナンスの重要性を説明するものです。 Machine translation (unreviewed)
This informational bulletin explains the importance of maintaining the vehicle.
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10159572
Received by source: 2019-05-13
Incident date: Unknown

Open original text and source Open the provider's page (external)