Hummer H2. Manual - part 1722

8. Install the PCV hose. 

Fig. 91: Ignition Coil Bracket Studs 
Courtesy of GENERAL MOTORS CORP. 

9. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the 

bracket bolts.  

10. Install the ignition coils and bracket to the rocker arm cover.  

11. Install the ignition coil bracket studs to the rocker cover. 

Tighten: Tighten the studs to 12 N.m (106 lb in).

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 92: Heater Hose Bracket & Nut 
Courtesy of GENERAL MOTORS CORP. 

12. Install the heater hose bracket and nut. 

Tighten: Tighten the nut to 9 N.m (80 lb in). 

13. Position the surge tank/heater hoses to the heater hose bracket. 

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 93: Harness Clips, Main Coil Harness, Fuel Injectors & (EGR) Valve Electrical Connectors 
Courtesy of GENERAL MOTORS CORP. 

14. Install the spark plug wires to the ignition coils.  

15. Re-position the engine harness.  

16. Install the harness clips (2).  

17. Connect the main electrical connector (1) feeding the ignition coils.  

18. Install the CPA lock.  

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

VALVE ROCKER ARM AND PUSH ROD REPLACEMENT 

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Removal Procedure 

Fig. 94: Valve Rocker Arms 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left or Valve 

Rocker Arm Cover Replacement - Right .  

2. Remove the valve rocker arm bolts.  

3. Remove the valve rocker arms. 

IMPORTANT: Place the valve rocker arms, pushrods, and pivot support, in a rack so 

that the can be installed in the same location from which they were 
removed.

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2