Hummer H3. Manual — part 750

Fig. 70: View Of Cruise Release Switch
Courtesy of GENERAL MOTORS CORP.

1. Rotate the torque converter clutch/cruise control release switch counter clockwise, allowing

the retainer to release.

2. Pull the brake pedal rearward to full stop.

3. While holding the brake pedal in position rearward, push the switch inward fully until the

switch body contacts the brake pedal arm.

At this point the plunger in the switch should be pushed in.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

4. Rotate the switch clockwise until a "click" is heard.

TRANSMISSION FLUID COOLER HOSE/PIPE REPLACEMENT

Removal Procedure

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Disconnect the transmission fluid cooler lines from the radiator. Refer to Transmission

Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

3. Remove the transmission fluid cooler lines from the retainer located on the radiator.

Fig. 71: View Of Transmission Fluid Cooler Lines
Courtesy of GENERAL MOTORS CORP.

4. Remove the transmission fluid cooler lines from the retainer located on the right side of the

engine.

5. Support the transmission with a transmission jack.

6. Remove the transmission support. Refer to Transmission Support Crossmember

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Replacement .

7. Remove the front exhaust pipe assembly. Refer to Catalytic Converter Replacement .

8. Carefully lower the transmission to gain access to the transmission fluid cooler line fittings.

9. Disconnect the transmission fluid cooler lines from the transmission. Refer to Transmission

Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

10. Remove the transmission fluid cooler lines from the vehicle.

Installation Procedure

1. Install the transmission fluid cooler lines to the vehicle.

2. Install the transmission fluid cooler lines to the transmission. Refer to Transmission Fluid

Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

NOTE:

Ensure that the cooler line being installed has a plastic cap on
each end that connects to a quick connect fitting. If no plastic
cap exists or the plastic cap is damaged, obtain a new plastic
cap and position on to the cooler line prior to the cooler line
installation.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Fig. 72: View Of Transmission Fluid Cooler Lines
Courtesy of GENERAL MOTORS CORP.

3. Raise the transmission into position.

4. Install the front exhaust pipe assembly. Refer to Catalytic Converter Replacement .

5. Install the transmission support. Refer to Transmission Support Crossmember

Replacement .

6. Remove the transmission jack.

7. Install the clip (2) that holds the transmission fluid cooler lines together.

8. Install the transmission fluid cooler lines to the right side of the engine.

9. Install the transmission fluid cooler line to the retainer located on the radiator.

10. Install the transmission fluid cooler lines to the radiator. Refer to Transmission Fluid

Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

11. Lower the vehicle.

12. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to

Transmission Fluid Check.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3