Engine - Duramax Flywheel Housing Seals
INFORMATIONBulletin No.: 10-06-01-004A
Date: October 05, 2011
Subject: Information on Duramax Flywheel Housing Seals
Models:
2010-2012 Chevrolet Express
2011-2012 Chevrolet Silverado 2500HD/3500 Series
2010-2012 GMC Savana
2011-2012 GMC Sierra 2500HD/3500 Series
Equipped with 6.6L Diesel Engine RPO LGH or LML
Supercede:
This bulletin is being revised to add the 2012 model year. Please discard Corporate Bulletin Number 10-06-01-004 (section 06 - Engine/Propulsion System).
Some vehicles equipped with the Duramax(TM) Diesel were involved in a mid year change. Some of the vehicles may have been built with a flywheel housing that uses two different style seals; a left (2) and a right (1) one as installed.
On affected vehicles that need these seals replaced (for example; if coolant is leaking out of the rear cover), the left (as installed) seal is an orange O-ring (2), GM P/N 94056175, and the right seal is a blue/green (1) press-in-place seal, GM P/N 12627895.
The machining of the flywheel housing for each style of seal is different and not cross compatible. If the flywheel housing is removed for service, replace the seals with the appropriate part in the right area.
Parts Information
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