Description and Operation of Fuel Rail for Sierra 3500 V8-60L VIN U (2004)
1. Lubricate NEW fuel injector lower O-ring seals (4) with clean engine oil.
2. Install the NEW O-ring seals (4) onto each injector, if necessary.
3. Install the fuel rail.
4. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the fuel rail bolts.
NOTE: Refer to the Fastener Notice in Service Precautions.
5. Install the fuel rail bolts.
Tighten
Tighten the bolts to 10 N.m (89 lb in).
