Sierra Classic 2500 2WD V8-6.6L DSL Turbo (2007)
21. Remove the auxiliary generator, if equipped.
22. Disconnect the glow plug control module electrical connectors (1, 2).
23. Remove the positive crankcase ventilation (PCV) hose/pipe.
24. Prior to removing the fuel injector pipes, use compressed air to blow any debris from between the injector line and fittings. Wipe the fittings clean
of debris.
25. Spray lithium grease, GM P/N 12346293 or equivalent, between the fuel injector line and fittings to assist in containing any debris during removal.
NOTE: DO NOT use compressed air to clean debris from the fuel injector inlet after the fuel line is removed. Using compressed air can allow
debris to enter the fuel injector inlet and damage the fuel injector.
26. Remove the left fuel injector pipes.
INSTALLATION PROCEDURE
NOTE: Ensure proper torquing of the fuel injector line. An under-torqued fuel injector line will not seal properly and an over-torqued fuel injector
line may damage the fuel injector fitting. An improperly sealed or damaged fuel injector line or fuel injector fitting will cause a fuel leak.
1. NOTE: Refer to Fastener Notice.