Chevrolet Silverado / GMC Sierra. Service manual — part 1968

Fig. 247: Rocker Arm Cover Gasket
Courtesy of GENERAL MOTORS CORP.

17. Remove and discard the old gasket (1).

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. 248: Oil Fill Cap & Oil Fill Tube
Courtesy of GENERAL MOTORS CORP.

18. Remove the oil fill cap (424) from the oil fill tube (423), if necessary.

19. Remove and discard the oil fill tube, if necessary.

Installation Procedure

IMPORTANT:

All gasket surfaces should be free of oil or other foreign
material during assembly.

DO NOT reuse the valve rocker arm cover gasket.

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. 249: Oil Fill Cap & Oil Fill Tube
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the O-ring seal (422) of the NEW oil fill tube with clean engine oil.

2. Insert the NEW oil fill tube (423) into the rocker arm cover.

Rotate the tube clockwise until locked in the proper position.

3. Install the oil fill cap (424) into the tube.

If the oil fill tube has been removed from the rocker arm
cover, install a NEW fill tube during assembly.

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

Rotate the cap clockwise until locked in the proper position.

Fig. 250: Rocker Arm Cover Gasket
Courtesy of GENERAL MOTORS CORP.

4. Install a NEW rocker cover gasket (1) into the valve rocker arm cover lip.

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