Chevrolet Silverado / GMC Sierra. Manual — part 2048

Fig. 67: View Of Special Tool & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Remove the radiator support. Refer to Radiator Support Replacement .

2. Remove the valve lifters. Refer to Valve Lifter Replacement (L92 - First Design) or

Valve Lifter Replacement (L92 - Second Design) or Valve Lifter Replacement (LY2
and LY6) or Valve Lifter Replacement (LH6, LMG, LY5 and L76) .

3. Remove the engine front cover. Refer to Engine Front Cover Replacement (LC9, LH6,

LMG, LY2 and LY5) or Engine Front Cover Replacement (LY6, L76 and L92) .

4. Remove the starter motor. Refer to Starter Motor Replacement (4.3L) or Starter Motor

Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or Starter Motor Replacement (6.6L) .

5. Install the J 42386-A (1) and bolts. See Special Tools . Use one M10-1.5 x 120 mm and

one M10-1.5 x 45 mm bolt for proper tool operation.

Tighten: Tighten the J 42386-A bolts to 50 N. See Special Tools .m (37 lb ft).

NOTE:

Refer to Fastener Notice .

IMPORTANT: Ensure that the teeth of the J 42386-A mesh with the teeth of

the engine flywheel. See Special Tools .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 68: Identifying Camshaft & Crankshaft Marks
Courtesy of GENERAL MOTORS CORP.

6. Rotate the crankshaft sprocket until the camshaft sprocket alignment mark (1) and the

crankshaft sprocket alignment mark (2) are aligned.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 69: View Of Camshaft Sprocket, Timing Chain & Sprocket Bolt
Courtesy of GENERAL MOTORS CORP.

7. Remove the camshaft sprocket bolt (206).

8. Remove the camshaft sprocket (205) and timing chain (208).

NOTE:

Do not turn the crankshaft assembly after the timing chain has
been removed in order to prevent damage to the piston
assemblies or the valves.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado