Hummer H2. Manual — part 1716
Fig. 68: Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.
1. Remove the intake manifold. Refer to Intake Manifold Replacement .
2. Gently pry up the rubber covers.
3. Disconnect the knock sensor electrical connectors.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
Fig. 69: Knock Sensors
Courtesy of GENERAL MOTORS CORP.
4. Remove the knock sensors.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
Fig. 70: Engine Valley Cover & Gasket
Courtesy of GENERAL MOTORS CORP.
5. Remove the engine valley cover bolts.
6. Remove the engine valley cover and gasket.
7. Discard the old gasket.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
Fig. 71: Knock Sensor Oil Seals & Cover
Courtesy of GENERAL MOTORS CORP.
8. Remove the knock sensor oil seals (1) from the cover (2).
9. Clean and inspect the engine valley cover. Refer to Engine Valley Cover Cleaning and Inspection .
Installation Procedure
IMPORTANT: All gasket surfaces should be free of oil or other foreign material during
assembly.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
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