Chevrolet Silverado / GMC Sierra. Service manual — part 253

Fig. 63: Identifying Intake Manifold Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

4. Install the intake manifold bolts.

Tighten:

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

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

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 64: View Of EVAP Purge Solenoid Vent Tube
Courtesy of GENERAL MOTORS CORP.

5. Install the EVAP purge solenoid vent tube to the solenoid (1) and vapor pipe.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 65: View Of Manifold Absolute Pressure (MAP) Sensor
Courtesy of GENERAL MOTORS CORP.

6. Install the MAP sensor (1) to the intake manifold.

7. Route the electrical harness into position over the engine.

IMPORTANT: Lightly coat the MAP sensor seal with clean engine oil before

installing.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 66: View Of MAP Sensor & Knock Sensor Electrical Connectors
Courtesy of GENERAL MOTORS CORP.

8. Connect the knock sensor harness electrical connector to the intake manifold.

9. Connect the following electrical connectors.

MAP sensor (1)

Knock sensor (2)

10. Install the fuel injectors. Refer to Fuel Injector Replacement .

11. Install the throttle body. Refer to Throttle Body Assembly Replacement .

ENGINE BLOCK VALLEY COVER REPLACEMENT

Removal Procedure

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2