Chevrolet Silverado / GMC Sierra. Manual — part 255

Fig. 71: View Of Knock Sensor Oil Seals & Cover
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the NEW knock sensor seals (1) with clean engine oil.

2. Install the knock sensor oil seals (1) into the engine valley cover (2).

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 72: View Of Engine Valley Cover, Gasket & Bolts
Courtesy of GENERAL MOTORS CORP.

3. Install the engine valley cover and a NEW gasket onto the engine block.

4. Install the engine valley cover bolts.

Tighten: Tighten the bolts to 25 N.m (18 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 73: View Of Knock Sensors
Courtesy of GENERAL MOTORS CORP.

5. Install the knock sensors.

Tighten: Tighten the sensors to 20 N.m (15 lb ft).

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 74: View Of Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.

6. Connect the knock sensor electrical connectors.

7. Push down on the rubber covers.

8. Install the intake manifold. Refer to Intake Manifold Replacement.

VALVE ROCKER ARM COVER REPLACEMENT - LEFT SIDE

Removal Procedure

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

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