Hummer H2. Manual - part 2579

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Damaged wiring loom  

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Worn, missing, or cut pass-through connector O-ring seal.  

2. Install the transmission wiring harness pass-through connector into the transmission case. Ensure 

connector tabs lock into place.  

3. Move the harness to one side in order to install the valve body. 

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

Fig. 284: Identifying Checkball Installation Positions
Courtesy of GENERAL MOTORS CORP. 

4. Install the checkballs (2-6, 8, 12) in the valve body and retain checkballs with J 36850 or an equivalent. 

Some models do not use a #5 checkball. 

Fig. 285: Installing Valve Body 
Courtesy of GENERAL MOTORS CORP. 

5. Install the valve body over the J 25025-5 Guide Pins, and connect the manual valve link to the manual 

valve.  

IMPORTANT: Valve bodies are model dependent.

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

6. Install two bolts to hold the valve body in place.  

7. Remove the J 25025-5 . 

Fig. 286: Locating Fluid Level Indicator Stop Bracket & Valve Body Bolts 
Courtesy of GENERAL MOTORS CORP. 

8. Install the fluid level indicator stop bracket (93) if equipped and the valve body bolts (62) that are shown 

only.  

9. Finger tighten the bolts. 

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

Fig. 287: Inspection Areas On Transmission Fluid Pressure (TFP) Manual Valve Position Switch 
Assembly 
Courtesy of GENERAL MOTORS CORP. 

10. Inspect the Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly for the following 

conditions: 

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Damage  

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Debris  

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Damaged or missing O-rings  

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Cracked connector  

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Loose electrical terminals  

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Poor terminal retention  

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Sediment in switch membrane  

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E