Hummer H2. Manual - part 2617

ADJUSTMENTS 

PARK/NEUTRAL POSITION SWITCH 

1. Place the transmission shifter in the Neutral (N) position.  

2. With an assistant in the drivers seat, raise and suitably support the vehicle.  

3. Loosen the PNP switch bolts.  

4. With the vehicle in the Neutral (N) position, rotate the switch while the assistant attempts to start the 

engine.  

5. Following a successful start, turn the engine OFF.  

6. Tighten the PNP switch bolts to specification. See TORQUE SPECIFICATIONS .  

7. Lower the vehicle.  

8. Check the PNP switch for proper operation. The engine must start in the Park (P) or Neutral (N) positions 

only.  

9. Replace the PNP switch if proper operation can not be achieved. See PARK/NEUTRAL POSITION 

SWITCH .  

SHIFT CABLE 

1. Ensure the steering column shift lever and the transmission manual shaft lever are in the Park (P) 

position.  

2. Raise and suitably support the vehicle.  

3. Pull back the white plastic cover (1) on the center connector. See Fig. 12 . Pull up on the center tabs of 

the lock button (2). 

4. Push the natural colored lock button (2) down to engage the locking teeth on the shift cable end (1). See 

Fig. 13 .  

5. Release the white cover (1). See Fig. 14 . Verify the white cover (1) conceals the natural colored lock (2). 

WARNING:

Vehicle is equipped with Supplemental Inflatable Restraint (SIR) system. 
When servicing vehicle, use care to avoid accidental air bag deployment. 
SIR system-related components are located in various locations 
throughout interior and exterior of vehicle, depending on application. DO 
NOT use electrical test equipment on or near these circuits. If necessary, 
deactivate SIR system before servicing components. See appropriate AIR 
BAG DEACTIVATION PROCEDURES article in RESTRAINTS. 

NOTE:

Apply the Park brake. The engine must start in the Park (P) or Neutral (N) 
positions only. Check the Park/Neutral Position (PNP) switch for proper 
operation. 

NOTE:

This step must be performed correctly to avoid a misadjusted cable. DO 
NOT grasp the shift cable end (2) during this procedure. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

If the white cover (1) does not conceal the natural colored lock (2), the shift cable must be readjusted. 
Test the transmission for proper shift operation. If all of the gear positions cannot be achieved, the shift 
cable must be readjusted.  

Fig. 12: Unlocking Shift Cable Adjuster 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 13: Identifying Shift Cable Lock Button 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 14: Releasing Shift Cable White Cover 
Courtesy of GENERAL MOTORS CORP. 

REMOVAL & INSTALLATION 

WARNING:

Vehicle is equipped with Supplemental Inflatable Restraint (SIR) system. 
When servicing vehicle, use care to avoid accidental air bag deployment. 
SIR system-related components are located in various locations 
throughout interior and exterior of vehicle, depending on application. DO 
NOT use electrical test equipment on or near these circuits. If necessary, 
deactivate SIR system before servicing components. See appropriate AIR 
BAG DEACTIVATION PROCEDURES article in RESTRAINTS. 

CAUTION: When battery is disconnected, vehicle computer and memory systems 

may lose memory data. Driveability problems may exist until computer 
systems have completed a relearn cycle. Before disconnecting battery, 
see COMPUTER RELEARN PROCEDURES article in GENERAL 
INFORMATION. 

CAUTION: Use the correct fastener in the correct location. Replacement fasteners 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2