Hummer H2. Manual - part 2663

Fig. 11: Transfer Case Drain Plug 
Courtesy of GENERAL MOTORS CORP. 

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

2. Remove the fill plug from the transfer case. 

3. Remove the drain plug from the transfer case.  

Installation Procedure 

IMPORTANT: When draining the transfer case, make sure that an approved drain pan is 

used.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

Fig. 12: Transfer Case Drain Plug 
Courtesy of GENERAL MOTORS CORP. 

1. Apply pipe sealant GM P/N 12346004 (Canadian P/N 10953480) to the threads on the drain plug.  

2. Install the drain plug in the transfer case. 

Tighten: Tighten the drain plug to 25 N.m (18 lb ft). 

3. Fill the transfer case to the bottom of the fill hole with the proper fluid.  

4. Apply pipe sealant GM P/N 12346004 (Canadian P/N 10953480) to the threads on the drain plug.  

5. Install the fill plug. 

Tighten: Tighten the fill plug to 25 N.m (18 lb ft). 

6. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

TRANSFER CASE MOTOR/ENCODER REPLACEMENT 

Removal Procedure 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: If the drain or fill plug have to be replaced, used only aluminum 

replacement drain plugs.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

Fig. 13: Transfer Case Encoder/Motor Assembly 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the transfer case shield. Refer to Transfer Case Shield Replacement .  

2. Disconnect the encoder motor electrical connector.  

3. Remove the encoder motor bolts.  

4. Remove the encoder motor.  

5. Remove the actuator insulator.  

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

Installation Procedure 

IMPORTANT:

z

If the encoder motor is being replaced, ensure that the transfer case is in 
the neutral position. Manually shift the transfer case at the shift shaft, 
using a crescent wrench if necessary.  

z

When installing the encoder motor, ensure that the encoder motor is 
indexed correctly and the motor is flat against the transfer case before 
tightening the bolts.  

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2