Chevrolet Silverado / GMC Sierra. Service manual — part 421

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the oil pan skid plate.

Fig. 16: Identifying Engine Shield And Retaining Bolts
Courtesy of GENERAL MOTORS CORP.

3. Remove the engine protection shield.

2008 Chevrolet Silverado 1500

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

Fig. 17: View Of Engine Mount To Engine Mount Frame Bracket
Courtesy of GENERAL MOTORS CORP.

4. Inspect for loose or missing bolts at the following locations:

Engine mount bracket to engine

Engine mount frame bracket to frame

Engine mount to engine mount bracket

Engine mount to engine mount frame bracket

NOTE:

Refer to Engine Mounting Notice .

2008 Chevrolet Silverado 1500

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

5. Replace missing or loose bolts. Refer to Engine Mechanical Specifications .

Fig. 18: View Of Ground Wire Bolt Bosses (Left Side)
Courtesy of GENERAL MOTORS CORP.

NOTE:

Refer to Engine Lifting Notice .

2008 Chevrolet Silverado 1500

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

6. If the vehicle is 4-wheel drive (4WD), you will not be able to access the lifting points on the

engine. In order to raise the engine, attach a chain to the front of the engine. Then follow the
inspection steps.

7. If the vehicle is rear-wheel drive (RWD), in order to raise the engine to inspect the left

engine mount, use a suitable jack on the ground wire bolt bosses on the left side of the
engine

Fig. 19: View Of Ground Wire Bolt Bosses (Right Side)

2008 Chevrolet Silverado 1500

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