Silverado 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
Cylinder Head Gasket: Technical Service Bulletins
Diesel Engine - Reman Engine Head Gasket Thickness
INFORMATION
Bulletin No.: 07-06-01-009A
Date: November 02, 2009
Subject: 6.6L LB7, LLY Duramax(R) Diesel Engine Cylinder Head Gasket Missing Thickness Grade Markings - Inspect Block for Stampings
Models:
2001-2005 Chevrolet Silverado
2003-2005 Chevrolet Kodiak C4500/5500 Series
2001-2005 GMC Sierra
2003-2005 GMC TopKick C4500/5500 Series
with 6.6L Duramax(R) Diesel Engine (VINs D, 1, 2 - RPOs LB7, LLY)
Supercede:
This bulletin is being revised to remove the Warranty Information and update the Parts Information. Please discard Corporate Bulletin Number
07-06-01-009 (Section 06 - Engine/Engine Mechanical).
A small number of remanufactured engines were built using oversized bore or milled deck gaskets that do not have any thickness grade identification
markings. These engines may show up in any model year from 2001-2005 if the vehicle has received an engine replacement.
Inspect the block for stampings (1) indicating cylinder overbore and a milled deck. The overbore gasket accommodates all cylinder bores from
0.010-0.030". All blocks that are milled are also over-bored.
Crimped Construction Style Head Gasket
First generation head gasket crimped construction (1).
Riveted Construction Style Head Gasket
