Hummer H2. Manual - part 2628

5. Install the cable retaining clip. Install the range selector cable end (2) to the transmission shift lever ball 

stud (1). See Fig. 44 . Lower the vehicle.  

SHIFT CABLE BRACKET 

Removal 

1. Apply the Parking brake. Place the transmission into Neutral. Raise and support the vehicle.  

2. Disconnect the transmission range selector cable from the shift lever and the bracket (2). See Fig. 46 and 

SHIFT CABLE .  

3. Remove the bolts (1) securing the transmission shift cable bracket (2) to the transmission. Remove the 

transmission shift cable bracket from vehicle. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 46: Removing & Installing Shift Cable Bracket 
Courtesy of GENERAL MOTORS CORP. 

Installation 

1. Install the shift cable bracket to the vehicle.  

2. Install the shift cable bracket bolts (1). See Fig. 46 . Tighten the bolts to specification. See TORQUE 

SPECIFICATIONS .  

3. Install the transmission range selector cable to the bracket (2) and the lever. See SHIFT CABLE .  

4. Lower the vehicle. Check the vehicle for proper operation. If cable adjustment is necessary, see SHIFT 

CABLE under ADJUSTMENTS.  

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

TCC SOLENOID, TCC PWM SOLENOID & WIRING HARNESS 

Removal 

1. Raise and support the vehicle. Remove the transmission oil pan and the filter. See DRAINING & 

REFILLING under LUBRICATION.  

2. Disconnect the transmission harness 20-way connector from the transmission internal harness pass-

through connector. See Fig. 47 . Depress both tabs on the connector and pull straight up, DO NOT pry the 
connector.  

3. Remove the 1-2 accumulator assembly. See ACCUMULATOR ASSEMBLY .  

4. Disconnect the internal wiring harness electrical connectors from the following components: 

z

Transmission fluid pressure switch. See Fig. 28 .  

z

1-2 shift control solenoid.  

z

2-3 shift control solenoid.  

z

Pressure control solenoid.  

z

TCC PWM solenoid.  

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3-2 shift control solenoid.  

5. Remove the TCC PWM solenoid retainer. See Fig. 48 .  

6. Remove the TCC PWM solenoid to access one of the TCC solenoid retaining bolts.  

7. Remove the pressure control solenoid retainer.  

8. Remove the pressure control solenoid. See Fig. 29 .  

9. Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring 

harness. See Fig. 49 .  

10. Using the seal protector retainer installer, release the pass-through electrical connector from the 

transmission case. See Fig. 50 . 

A. Use the small end of the seal protector retainer installer over the top of the connector.  

B. Twist to release the 4 tabs retaining the connector.  

C. Pull the harness connector down through the transmission case.  

11. Remove the TCC solenoid (with "O" ring seal) and wiring harness.  

12. Inspect the TCC solenoid and wiring harness assembly for the following defects: 

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Damage. See Fig. 51 .  

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Cracked connectors.  

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Exposed wires.  

z

Loose pins.  

NOTE:

Tools required: Seal Protector Retainer Installer (J-28458). 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 47: Disconnecting & Connecting Transmission Harness Connector 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2