Hummer H3. Manual — part 1116

Fig. 56: View Of Transmission Cooler Lines At Radiator
Courtesy of GENERAL MOTORS CORP.

15. Connect the transmission cooler lines to the radiator. Refer to Transmission Fluid Cooler

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

16. Install the oil pan skid plate.

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

18. Lower the vehicle.

19. Install the radiator vent inlet hose to the radiator.

20. Evacuate and recharge the A/C system. Refer to REFRIGERANT RECOVERY AND

RECHARGING .

21. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or

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

RADIATOR AIR BAFFLE ASSEMBLIES AND DEFLECTORS

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

Fig. 57: Identifying Radiator Air Baffle Assemblies & Deflectors
Courtesy of GENERAL MOTORS CORP.

Radiator Air Baffle Assemblies and Deflectors

COOLANT HEATER REPLACEMENT (WITH LLR)

Removal Procedure

1. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) or

Callout

Component Name

Preliminary Procedure

1. Remove the grille guard. Refer to Grille Guard/Brush Guard Replacement (Base)

or Grille Guard/Brush Guard Replacement (H3X) .

2. Remove the grille. Refer to Grille Replacement .

1

Push Pin Retainer

2

Radiator Front Baffle Assembly
Tip: NOT used on 20U, 22U, 41U, 46U color trucks.

3

Push Pin Retainer

4

Radiator Front Baffle Assembly

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

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

Fig. 58: Locating Coolant Heater & Cord
Courtesy of GENERAL MOTORS CORP.

2. Raise and support the vehicle only high enough to access the coolant heater (6) through the

wheelhouse. Refer to Lifting and Jacking the Vehicle .

3. Remove the left wheelhouse liner. Refer to Wheelhouse Panel Replacement (Front) or

Wheelhouse Panel Replacement (Rear) .

4. Disconnect the coolant heater cord (4) from the coolant heater (6).

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

Fig. 59: View Of Coolant Heater
Courtesy of GENERAL MOTORS CORP.

5. Remove the coolant heater from the engine block.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Cooling - H3