Hummer H3. Manual — part 1112

10. Fill the cooling system with the specified coolant and concentration. Refer to Cooling

System Draining and Filling (Static Fill) or Cooling System Draining and Filling
(Vac-N-Fill).

11. Inspect for leaks.

FAN SHROUD REPLACEMENT (LLR)

Removal Procedure

1. Remove the radiator hose-inlet. Refer to Radiator Inlet Hose Replacement (LLR).

Fig. 41: Identifying Fan Shroud
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

2. Remove the transmission oil cooler lines from the fan shroud retainer.

3. Rotate the slip ring from under the fan shroud.

4. Disconnect the cam sensor electrical connector.

5. Remove the fan shroud (3).

Installation Procedure

Fig. 42: Identifying Fan Shroud
Courtesy of GENERAL MOTORS CORP.

1. Install the fan shroud (3) to the vehicle.

2. Install the transmission oil cooler lines to the fan shroud retainer.

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

3. Rotate the slip ring to the original position.

4. Connect the cam sensor electrical connector.

5. Install the radiator hose-inlet. Refer to Radiator Inlet Hose Replacement (LLR).

RADIATOR REPLACEMENT

Tools Required

J 38185 Hose Clamp Pliers. See Special Tools.

Removal Procedure

1. Drain the coolant from the radiator. Refer to Cooling System Draining and Filling

(Static Fill) or Cooling System Draining and Filling (Vac-N-Fill).

2. Recover the refrigerant. Refer to REFRIGERANT RECOVERY AND

RECHARGING .

3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

4. Remove the oil pan skid plate.

5. Install the engine shield. Refer to Engine Shield Replacement .

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

Fig. 43: View Of Transmission Cooler Lines At Radiator
Courtesy of GENERAL MOTORS CORP.

6. Remove the transmission cooler lines from the radiator. Refer to Transmission Fluid

Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection for the 4L60-
E/4L65-E transmission, if equipped.

7. Using J 38185 reposition the radiator outlet hose clamp from the radiator. See Special

Tools.

2007 Hummer H3

2007 ENGINE Engine Cooling - H3