Hummer H2. Manual - part 2633

TORQUE SPECIFICATIONS .  

2. Lower the transmission and install the two nuts securing the transmission mount to the transmission 

support. Tighten the nuts to specification. See TORQUE SPECIFICATIONS .  

3. Remove the transmission jack. Install the catalytic converter guard. Tighten bolts to specification. See 

TORQUE SPECIFICATIONS . Install frame-to-engine protection shield. Tighten bolts to specification. 
See TORQUE SPECIFICATIONS .  

4. Lower the vehicle.  

VALVE BODY & PRESSURE SWITCH 

Removal 

1. Ensure removal of the valve body is necessary before proceeding. The following components can be 

serviced without removing the valve body from the transmission. See Fig. 63 . 

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Torque Converter Clutch Solenoid (1)  

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Pressure Control Solenoid (2)  

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Internal Wiring Harness (3)  

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2-3 Shift Solenoid (4)  

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1-2 Shift Solenoid (5)  

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Transmission Fluid Pressure Manual Valve Position Switch (6)  

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3-2 Shift Solenoid (7)  

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Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid (8)  

2. Remove the fluid level indicator.  

3. Remove the filter. See DRAINING & REFILLING under LUBRICATION.  

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

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Transmission fluid pressure manual valve position switch. See Fig. 28 .  

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1-2 shift control solenoid.  

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2-3 shift control solenoid.  

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Pressure control solenoid.  

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TCC PWM solenoid.  

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3-2 shift control solenoid.  

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Bracket bolt.  

5. Remove the fluid indicator stop bracket bolt (2). See Fig. 64 . Remove the fluid indicator bracket (1).  

6. Remove the TCC PWM solenoid retainer (2) with a small screwdriver. See Fig. 48 . Rotate the solenoid 

(1) in the bore, if necessary, until the flat part of the retainer (2) is visible.  

7. Remove the TCC PWM solenoid (1) to access the TCC solenoid retaining bolts. Remove the TCC 

solenoid bolts. See Fig. 65 .  

8. Remove the TCC solenoid (with "O" ring seal) and wiring harness from the control valve body.  

9. Reposition the harness to the side of the transmission case. See Fig. 50 .  

10. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

valve body. See Fig. 66 .  

11. Remove the transmission fluid pressure switch and inspect for damage or debris. See Fig. 67 .  

12. Remove the manual detent spring retaining bolt. Remove the manual detent spring. See Fig. 68 .  

13. Inspect the manual detent spring for cracks or damage. 

14. Remove the remaining valve body bolts.  

15. Carefully begin to lower the control valve body down from the transmission case while simultaneously 

disconnecting the manual valve link. See Fig. 69 .  

Fig. 63: Identifying Serviceable Components 
Courtesy of GENERAL MOTORS CORP.

CAUTION: Keep the control valve body level when lowering it from the vehicle. 

This will prevent the loss of checkballs located in the control valve 
body passages. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 64: Removing & Installing Fluid Indicator Stop Bracket 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 65: Removing & Installing TCC Retainer Bolts 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2