Hummer H2. Manual - part 2627

Fig. 43: Exploded View Of Pressure Regulator 
Courtesy of GENERAL MOTORS CORP. 

Installation 

1. Install the pressure regulator valve (1). See Fig. 43 .  

2. Install the pressure regulator isolator spring (3) and the pressure regulator valve spring (2). 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

3. Install the reverse boost valve (4) in the reverse boost valve sleeve (5).  

4. Install the reverse boost valve (4) and sleeve (5) in the oil pump cover.  

5. Compress the reverse boost valve sleeve into the bore of the oil pump to expose the retaining ring slot.  

6. Install the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve 

sleeve. See Fig. 42 .  

7. Install the transmission oil filter and pan. See DRAINING & REFILLING under LUBRICATION.  

SHIFT CABLE 

Removal 

1. Position the shift lever to the Park position. Raise the vehicle. 

2. Remove the shifter retaining clip and then the cable from the bracket at the transmission. Remove the 

shift cable end (2) from the transmission shift lever ball stud (1). See Fig. 44 .  

3. Lower the vehicle and ensure that the shifter lever is still in the park position.  

4. Remove center console. See CENTER CONSOLE .  

5. Remove the cable end (1) from the floor shift control assembly ball stud. See Fig. 45 . Remove the shift 

cable (2) from the floor shifter control assembly.  

6. Remove the grommet on the shift cable from the floor panel. Remove the shift cable from the vehicle. 

NOTE:

Ensure the transmission manual shaft is positioned to mechanical park. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 44: Removing & Installing Shift Cable At Transmission Lever 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 45: Identifying Shift Cable Assembly 
Courtesy of GENERAL MOTORS CORP. 

Installation 

1. Route the cable through the hole in the floor panel. Ensure that the transmission shift lever is in the 

mechanical Park position.  

2. Install the cable grommet to the floor panel. Install the shift cable end (2) to the transmission shift lever 

ball stud (1). See Fig. 45 .  

3. Install center console. See CENTER CONSOLE . Raise the vehicle.  

4. Ensure that the transmission manual shaft lever is in the mechanical park position. Install the range 

selector cable into the bracket at the transmission. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2