Hummer H2. Manual - part 2043

Fig. 43: Identifying Upper Trim Cover 
Courtesy of GENERAL MOTORS CORP. 

7. Remove 2 TORX(R) head screws (2) from the upper trim cover (1).  

8. Remove the upper trim cover (1). 

 

2004 Hummer H2 

2004 RESTRAINTS SIR - Hummer H2

  

Fig. 44: Identifying SIR Coil 
Courtesy of GENERAL MOTORS CORP. 

9. Remove the wire harness straps from the steering wheel column wire harness.  

10. Remove the retaining ring (3).  

11. Remove the SIR coil (4) from the steering shaft.  

12. If replacing, discard the SIR coil.  

Installation Procedure 

NOTE:

The new SIR coil assembly will be centered. Improper alignment of the SIR 

 

2004 Hummer H2 

2004 RESTRAINTS SIR - Hummer H2

  

Fig. 45: Block Tooth Of Steering Shaft Assembly In 12 O'clock Position 
Courtesy of GENERAL MOTORS CORP. 

1. Verify the following: 

z

The wheels on the vehicle are straight ahead. 

coil assembly may damage the unit, causing an inflatable restraint 
malfunction.

NOTE:

The wheels of the vehicle must be straight ahead and the steering column 
in the LOCK position before disconnecting the steering column or 
intermediate shaft from the steering gear. Failure to do so will cause the 
SIR coil assembly to become uncentered, which may cause damage to the 
coil assembly.

 

2004 Hummer H2 

2004 RESTRAINTS SIR - Hummer H2

  

z

That J 42640 is installed or the ignition switch is in the LOCK position.  

Fig. 46: SIR Coil 
Courtesy of GENERAL MOTORS CORP. 

2. If reusing the existing coil it MUST be centered, refer to Inflatable Restraint Steering Wheel Module 

Coil Centering in Steering Wheel and Column. 

IMPORTANT: Do not remove the centering tab from the new SIR coil until the 

installation is complete. If the SIR coil does not come with a centering tab, 
you must center the SIR coil.

 

2004 Hummer H2 

2004 RESTRAINTS SIR - Hummer H2