Hummer H2. Manual - part 1456

Fig. 108: View Of Main Ignition Coil Wire Harness Connector & Clips
Courtesy of GENERAL MOTORS CORP.

11. Remove the CPA retainer from the left side of the engine.

12. Disconnect the following electrical connectors from the left side of the engine:

Main coil (2)

Fuel injectors

13. Remove the harness clips from the fuel rail (1).

14. Reposition the engine wire harness aside.

2004 Hummer H2

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

Fig. 109: CPA Retainer & Tab
Courtesy of GENERAL MOTORS CORP.

15. Perform the following steps in order to disconnect the fuel injector electrical connectors:

1. Mark the connectors to their corresponding injectors to ensure correct reassembly.

2. Pull the CPA retainer (2) on the connector up one click.

3. Push the tab (1) on the connector in.

4. Disconnect the fuel injector electrical connector.

5. Repeat the steps for each injector electrical connector.

2004 Hummer H2

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

Fig. 110: View Of PCV Hose
Courtesy of GENERAL MOTORS CORP.

16. Remove the positive crankcase ventilation (PCV) hose.

2004 Hummer H2

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

Fig. 111: Identifying Fuel Feed & EVAP Pipes
Courtesy of GENERAL MOTORS CORP.

17. Disconnect the fuel feed pipe (1) from the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal

Collar) .

2004 Hummer H2

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