Chevrolet Silverado / GMC Sierra. Service manual — part 561

Fig. 131: View Of Valve Lifter, Guides, Retainers & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Loosen the valve lifter guide hold down bracket bolts.

2. Remove the valve lifter guide hold down brackets.

3. Remove the valve lifter guides.

4. Remove the valve lifters.

FUEL INJECTION PUMP REMOVAL

2008 Chevrolet Silverado 1500

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

Fig. 132: Locating Camshaft Gear Access Cover
Courtesy of GENERAL MOTORS CORP.

1. Remove the camshaft gear access hole cover bolt.

2. Remove the camshaft gear access hole cover.

2008 Chevrolet Silverado 1500

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

Fig. 133: Aligning Camshaft Gear Tension Relief Hole
Courtesy of GENERAL MOTORS CORP.

3. Rotate the crankshaft until the camshaft gear tension relief hole is in line with the front

cover access hole.

2008 Chevrolet Silverado 1500

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

Fig. 134: Unloading Spring Tension From Two Piece Cam Gear
Courtesy of GENERAL MOTORS CORP.

4. Use a suitable tool to unload the spring tension from the two piece cam gear. Apply pressure

towards the right side of the engine while removing the injection pump.

2008 Chevrolet Silverado 1500

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