Chevrolet Silverado / GMC Sierra. Service manual — part 1930

Fig. 99: View Of Intake Manifold-To-Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

21. Install NEW intake manifold gaskets (514) to the intake manifold.

22. Remove the covers from the cylinder head passages.

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. 100: Intake Manifold
Courtesy of GENERAL MOTORS CORP.

23. Install the intake manifold (500).

IMPORTANT: The aid of an assistant may be helpful in holding the engine

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

24. Tighten the intake manifold bolts (512) until snug.

Fig. 101: Identifying Intake Manifold Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

25. Tighten the intake manifold bolts to specifications.

Tighten:

Tighten the bolts a first pass in the sequence shown to 5 N.m (44 lb in).

Tighten the bolts a final pass in the sequence shown to 10 N.m (89 lb in).

harness up out of the way so the upper intake manifold cover
does not get caught against the engine harness.

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. 102: View Of PCV Hose
Courtesy of GENERAL MOTORS CORP.

26. Position and install the PCV hose to the intake manifold fitting.

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