Savana 3500 V8-6.6L DSL Turbo VIN 6 (2007)
Fuel Rail: All Technical Service Bulletins
Fuel System - Fuel Injector Service Information
INFORMATION
Bulletin No.: 03-06-04-036B
Date: November 10, 2009
Subject: Information on Servicing Duramax(TM) Fuel Injectors to Avoid and Remove Contamination
Models:
2001-2010 Chevrolet Silverado
2003-2009 Chevrolet Kodiak C4500/C5500 Series
2006-2010 Chevrolet Express Vans
2001-2010 GMC Sierra
2003-2009 GMC TopKick C4500/C5500 Series
2006-2010 GMC Savana Vans
Equipped with 6.6L Duramax(TM) Diesel Engine RPOs LB7, LLY, LMM, LBZ
Please Refer to GMVIS
Supercede:
This bulletin is being revised to add model years and update the Parts Information. Please discard Corporate Bulletin Number 03-06-04-036A (Section
06 - Engine/Propulsion System).
Fuel injectors may become contaminated during engine servicing. Debris between the injector line and the injector line nut may fall into the injector fuel
inlet upon removal. Refer to the following SI procedures for the appropriate model year, vehicle and engine RPO when performing the following bulletin
procedures for servicing the fuel injectors and lines.
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Fuel Injection Fuel Rail Assembly Replacement - Bank 1
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Fuel Injection Fuel Rail Assembly Replacement - Bank 2
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Fuel Injector Replacement (Right)
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Fuel Injector Replacement (Left)
Removal of Fuel Injector Lines
1. Before removing the fuel injector line, use regulated compressed air to blow any debris from between the fuel injector line and the fittings (1, 2).
Wipe the fittings (1, 2) clean of debris.
2. Spray Super Lube(R), P/N 12346241 (in Canada, P/N 10953474), or a lithium grease equivalent, between the fuel injector line and fittings (1, 2)
to assist in containing any debris during removal.
3. Remove the fuel injector line.
4. Remove the upper valve cover.
5. Remove the lower valve cover.
