Sierra 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
23. 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.
24. Spray lithium grease, GM P/N 12346293 or equivalent, between the fuel injector line and fittings to assist in containing any debris during removal.
25. Notice: 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.
Remove the left fuel injector pipes.
26. Remove the upper valve rocker arm cover bolts.
27. Remove the upper valve rocker arm cover.
28. Remove the upper valve rocker arm cover gasket.
29. Inspect the upper valve rocker arm cover gasket for damage, replace if necessary. Otherwise reuse the old gasket.
30. If required, clean and inspect the upper valve rocker arm cover.
Installation Procedure
