Chevrolet Silverado / GMC Sierra. Service manual — part 605

Courtesy of GENERAL MOTORS CORP.

1. Install a new O-ring to the engine block.

2. Lubricate the O-ring with engine oil.

3. Install the oil pump.

4. Install the oil pump bolts.

Tighten: Tighten the oil pump bolts to 21 N.m (15 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Fig. 100: View Of Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.

5. Install 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. 101: View Of Oil Pump Driven Gear
Courtesy of GENERAL MOTORS CORP.

6. Install the oil pump driven gear.

2008 Chevrolet Silverado 1500

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

Fig. 102: Removing/Installing Secondary Oil Pump Driven Gear Nut While Holding
Oil Pump Shaft
Courtesy of GENERAL MOTORS CORP.

NOTE:

Do not use an impact driver to remove or install the oil pump
driven gear nut. Use of an impact driver may shear the oil pump
drive gear pin in the crankshaft.

IMPORTANT: Look for an "L" on the end of the oil pump shaft. If there is an

2008 Chevrolet Silverado 1500

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