Hummer H2. Manual — part 1441

1. Partially drain the cooling system in order to allow the hoses at the throttle body to be removed. Refer to

Draining and Filling Cooling System in Engine Cooling.

2. Remove the air intake duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .

Fig. 57: View Of Throttle Body

cleaning solvents of any type.

IMPORTANT: An eight digit part identification number is stamped on the throttle body

casting. Refer to this number if servicing, or part replacement is required.

IMPORTANT: Cover or plug any openings when servicing the throttle body in order to

prevent possible contamination.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

Courtesy of GENERAL MOTORS CORP.

3. Disconnect the throttle actuator motor harness connector.

4. Disconnect the coolant hoses from the throttle body.

5. Remove the throttle body attaching bolts.

6. Remove the throttle body and the gasket.

7. Discard the throttle body gasket.

8. Inspect the crankcase ventilation hose and the tube. Replace any damaged components.

Installation Procedure

IMPORTANT: Do not reuse the throttle body gasket. Install a new gasket during

assembly.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 58: View Of Throttle Body
Courtesy of GENERAL MOTORS CORP.

1. Install a new throttle body gasket.

2. Install the throttle body assembly.

3. Install the throttle body attaching bolts.

Tighten: Tighten the throttle body bolts to 10 N.m (89 lb in).

NOTE:

Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: Always use a torque wrench in order to obtain the proper torque.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

4. Connect the coolant hoses to the throttle body.

5. Connect the TAC harness connector.

IMPORTANT: Verify that the TAC harness connector and the connector seal are

properly installed and not damaged.

2004 Hummer H2

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2