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

12-06-01-008B ・ information ・ for GM vehicles in general

Applies to

Applies to 2016 and earlier GM passenger cars and trucks.
the passage
Models: 2016 and Prior GM Passenger Cars and Trucks

Finding the cause

Possible causes

Some aftermarket crankcase flushing materials were found incompatible with GM engine components, with potential for damage to some engine seals and bearings.
the passage
Analysis of some of the aftermarket materials used for crankcase flushing indicate incompatibility with GM engine components and the potential for damage to some engine seals and bearings.

Correction

Repair

Replace transmission fluid only by draining and refilling, following the Service Information procedures.
the passage
Transmission fluid should only be replaced by draining and refilling following procedures in Service Information (SI).
For the transmission oil cooler, the flow check and flush with tool J-45096 is the approved procedure (Transmission Fluid Cooler Flow Check and Flush).
the passage
Refer to Transmission Fluid Cooler Flow Check and Flush in the Service Information website using the J-45096.

Caution

GM does not endorse or recommend engine crankcase flushing for any of its gasoline engines.
the passage
does not endorse or recommend engine crankcase flushing for any of its gasoline engines.
Flushing of A/C lines, radiators, transmission coolers and power steering systems is a recognized practice only after catastrophic failures or extreme corrosion 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.
External transmission fluid exchange or flush machines are not recommended for automatic or manual transmissions; they may affect the operation or durability of the transmission.
the passage
The use of external transmission fluid exchange or flush machines is not recommended for the automatic or manual transmission. Use of external machines to replace the fluid may affect the operation or durability of the 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
本情報ビュレチンは、ディーラー職員向けに未計画の補助サービス(フラッシング作業およびアジティブを含む)ならびにGM簡略メンテナンススケジュール(カナダのみ)の正しい使用に関する情報を提供するものである。 Machine translation (unreviewed)
This informational bulletin provides dealership personnel information on unscheduled supplemental services (including flushing services and additives) and proper use of GM simplified maintenance schedules (Canada only).
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10135383
Received by source: 2018-05-07
Incident date: Unknown

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