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

22-NA-074 ・ information ・ for GM vehicles in general

Applies to

Applies to all GM passenger cars and trucks, model years 2000 to 2023, gasoline engines only.
the passage
All GM Passenger Cars and Trucks 2000 2023 — — Gasoline Engines Only

Finding the cause

Possible causes

With a damaged rod or main bearing, the bearing debris is sent directly through the oil galleries and the components in the lubrication circuit.
the passage
If an engine experiences an engine failure due to a damaged rod or main bearing the debris from the bearing is sent directly through the oil galleries and components that are in the lubrication circuit.
If an oil-carrying component from the failed engine is not clean and is installed on the new engine, the debris could transfer to the new engine and damage it.
the passage
If one of the failed components that carries oil is not clean and installed on a new engine there is the possibility that the debris could transfer to the new engine causing damage.

Correction

Repair

Whenever an engine assembly is replaced for a connecting rod or crankshaft main bearing failure, also replace the oil cooler, the oil cooler lines and, if equipped, the oil tank.
the passage
any time an engine assembly is replaced due to a connecting rod or crankshaft main bearing failure, it is necessary to also replace the oil cooler, oil cooler lines and oil tank if equipped.

Caution

Some service engines come with the oil cooler and/or oil cooler lines already attached; those components then need not be replaced.
the passage
Note: Some service engines come with the oil cooler and/or oil cooler line(s) already attached to the new service engine. In this case, replacement of those components is not necessary.
Not every engine with bearing damage requires replacement of the oil cooler, oil cooler line, oil tank or even the engine.
the passage
Note: Not every engine that has bearing damage requires an oil cooler, oil cooler line, oil tank replacement or even the engine to be replaced.

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
本サービスブレテンは、エンジンが交換され、大量のデブリがオイリングシステム全体に流れた場合、オイルクーラー、オイルクーラーラインおよびオイルタンクの交換に関するサービス情報をテクニシャンに提供するものです。 Machine translation (unreviewed)
This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10227056
Received by source: 2022-12-03
Incident date: Unknown

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