Chevrolet Silverado / GMC Sierra. Service manual — part 501

Tighten: Tighten the bolt to 21 N.m (15 lb ft).

14. Install the oil level indicator.

15. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement.

OIL PUMP REPLACEMENT

Removal Procedure

Fig. 307: View Of Oil Pump Screen, Bolts, Nuts & Gasket
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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

1. If the vehicle is a 2-wheel drive (2WD), remove the flywheel housing. Refer to Engine

Flywheel Replacement.

2. Remove the engine front cover. Refer to Engine Front Cover Replacement.

3. Remove the upper oil pan. Refer to Upper Oil Pan Replacement.

4. Remove the oil pump screen bolts and nuts.

5. Remove the oil pump screen.

6. Remove and discard the oil pump screen gasket.

Fig. 308: Blocking Crankshaft From Turning Using Wooden Handle
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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

7. Block the crankshaft from turning with a wooden handle.

Fig. 309: Removing/Installing Secondary Oil Pump Driven Gear Nut While Holding
Oil Pump Shaft
Courtesy of GENERAL MOTORS CORP.

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

"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

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

gear nut.

Fig. 310: View Of Oil Pump Driven Gear & Nut
Courtesy of GENERAL MOTORS CORP.

9. Remove the oil pump driven gear.

2008 Chevrolet Silverado 1500

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