Sierra 2500 4WD V8-8.1L VIN G (2006)
1. Lubricate NEW lower injector O-ring seals (4) with clean engine oil.
2. Install the NEW O-ring seals (4) onto the spray tip end of each injector (3).
3. Install the fuel rail.
NOTE: Refer to the Fastener Notice in Service Precautions.
4. Install the fuel rail studs.
Tighten the studs to 12 N.m (106 lb in).
5. Connect the fuel feed (1) line to the fuel rail.
6. Connect the fuel injector electrical connectors.
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Install each connector onto the proper injector in order to ensure correct sequential injector firing order.
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Rotate the injectors as required in order to avoid stretching the wire harness.
