Sierra 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
31. Remove the fuel injection pump from the block.
Use 2 screwdrivers to work the pump from the block towards the rear of engine keeping the pump straight.
32. The fuel injection pump may need to be rotated in order to remove it from the vehicle.
Preparing The Fuel Injection Pump
1. Hold the fuel pump by the drive gear in a vice with copper jaw liners.
2. Loosen the gear nut until the nut is even with the end of the gear shaft.
3. Remove the gear from the tapered shaft of the injection pump.
4. Separate the injection pump and adapter by removing the 3 bolts and spacers.
5. Inspect the O-ring for damage on the pump adapter and replace, if necessary. Lubricate the O-ring with clean engine oil.
6. Clean all mating surfaces.
7. Install the adapter on the pump.
NOTE: Refer to Fastener Notice in Service Precautions.
8. Install the 3 bolts and spacers.
Tighten
Tighten the bolts to 20 N.m (15 lb ft).
9. Install the gear and nut.
Tighten
Tighten nut to 70 N.m (52 lb ft).
INSTALLATION PROCEDURE
