Hummer H2. Manual — part 1453

Fig. 99: Chassis Fuel Feed Hose & Fuel Filter
Courtesy of GENERAL MOTORS CORP.

2. Remove the caps from the rear fuel pipes.

3. Connect the chassis fuel feed hose at the fuel filter. Refer to Quick Connect Fitting(s) Service (Plastic

Collar) .

2004 Hummer H2

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

Fig. 100: View Of Rear Engine
Courtesy of GENERAL MOTORS CORP.

4. Install the fuel pipes into the transmission bracket clip.

5. Install the fuel pipes into the bellhousing stud clip (4).

6. Lower the vehicle.

7. Install the left hand catalytic converter. Refer to Catalytic Converter Replacement (Right Hand) in

Engine Exhaust.

2004 Hummer H2

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

8. Remove the caps from the fuel rail pipes.

9. Connect the fuel feed and return pipes (1, 2) to the fuel rail.

10. Tighten the fuel filler cap.

11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure

(Single Battery) in Engine Electrical.

12. Use the following procedure in order to inspect for leaks:

1. Turn ON the ignition, with the engine OFF, for 2 seconds.

2. Turn OFF the ignition for 10 seconds.

3. Turn ON the ignition, with the engine OFF.

4. Inspect for fuel leaks.

13. Install the engine sight shield. Refer to Engine Sight Shield Replacement (6.0L (LQ4)) in Engine

Mechanical.

FUEL HOSE/PIPES ASSEMBLY REPLACEMENT

Removal Procedure

1. Clean all the fuel pipe and hose connections and the surrounding areas before disconnecting in order to

avoid possible contamination of the fuel system.

2. Remove the fuel tank. Refer to Fuel Tank Replacement .

2004 Hummer H2

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

Fig. 101: Fuel Sender & Fuel Pressure Sensor Electrical Connectors
Courtesy of GENERAL MOTORS CORP.

3. Remove the rear fuel feed pipe and the rear fuel return pipe from the fuel sender and the fuel tank clips.

4. Cap the fuel pipes in order to prevent possible fuel system contamination.

Installation Procedure

2004 Hummer H2

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