Chevrolet Silverado / GMC Sierra. Service manual — part 175

Fig. 583: Identifying Upper Intake Manifold Attaching Studs
Courtesy of GENERAL MOTORS CORP.

26. Remove the upper intake manifold attaching studs.

27. Remove the upper intake manifold.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

28. Remove the upper intake manifold to lower intake manifold gasket.

29. Discard the upper intake manifold to lower intake manifold gasket.

Fig. 584: Injectors At Lower Intake Manifold Bores
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: During the removal of the fuel injector assembly, the

retainers that hold the injectors into the intake manifold may
become worn. This is OK. Upon installation of the upper

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

30. Remove the fuel meter body seal and discard.

31. Remove the 6 injectors from the lower intake manifold bores.

32. Remove the fuel meter body.

33. Remove the bolt and the fuel meter body bracket.

INTAKE MANIFOLD CLEANING AND INSPECTION

Fig. 585: Upper Intake Manifold
Courtesy of GENERAL MOTORS CORP.

1. Clean the upper intake manifold in cleaning solvent.

intake manifold, the injectors will be held fully seated, thus
keeping them from backing out of the lower intake manifold.

CAUTION: Refer to Safety Glasses Caution .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

2. Dry the upper intake manifold with compressed air.

Fig. 586: Lower Intake Manifold
Courtesy of GENERAL MOTORS CORP.

3. Clean the lower intake manifold in cleaning solvent.

4. Dry the lower intake manifold with compressed air.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado