Chevrolet Silverado / GMC Sierra. Service manual — part 526

1. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven

gear nut.

Fig. 402: View Of Oil Pump Driven Gear
Courtesy of GENERAL MOTORS CORP.

2. Remove the oil pump driven gear.

"L" present, the nut and shaft have left hand threads. Service
the nut accordingly.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 403: View Of Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.

3. Remove the oil pump drive gear and crank sensor reluctor assembly.

IMPORTANT: Do not damage the crankshaft sensor reluctor teeth.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 404: View Of Oil Pump, Bolts & O-Ring
Courtesy of GENERAL MOTORS CORP.

4. Remove the oil pump bolts.

5. Remove the oil pump.

6. Remove the O-ring and discard.

OFF-VEHICLE REPAIR INSTRUCTIONS

DRAINING FLUIDS AND OIL FILTER REMOVAL

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 405: View Of Fuel Filter
Courtesy of GENERAL MOTORS CORP.

1. Drain the fuel from the fuel filter.

1. Attach drain tube to fuel filter drain tap.

2. Place open end of drain tube into a suitable container.

3. Open fuel filter drain, and allow fuel to drain.

4. Close fuel filter drain.

5. Remove drain tube.

6. Properly dispose of used fuel.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado