Radiator: Service and Repair

Radiator Replacement (LH6, LS2) (5.3L and 6.0L)


Tools Required
* J 41240 Fan Clutch Remover and Installer
* J 38185 Hose Clamp Pliers



Removal Procedure

1. Drain the coolant from the radiator. Refer to Cooling System Draining and Filling (LL8) (Service and Repair)Cooling System Draining and Filling (LH6, LS2) (Service and Repair) .
2. Remove the lower radiator support shield, if equipped. Refer to Radiator Support Shield Replacement .




3. 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.
4. Reposition the outlet radiator hose clamp using J 38185 .
5. Remove the outlet radiator hose (1) from the radiator.
6. Lower the vehicle.




7. Reposition the inlet radiator hose clamp using J 38185 .
8. Remove the inlet radiator hose from the radiator.
9. Remove the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement (Service and Repair) .
10. Remove the air inlet grille. Refer to Air Inlet Grille Panel Replacement (Envoy, Trailblazer) .




11. Remove the coolant recovery line from the radiator.




12. Remove the upper radiator to condenser bolts.
13. Lift upward on the condenser to remove from the radiator retaining tab.
14. Remove the radiator.



Installation Procedure





1. Install the radiator.
2. Install the condenser to the radiator retaining tab.

Notice: Refer to Fastener Notice .

3. Install the bolts retaining the condenser to the radiator.

Tighten the bolts to 28 N.m (21 lb ft).





4. Install the coolant recovery line to the radiator.
5. Install the air inlet grille. Refer to Air Inlet Grille Panel Replacement (Envoy, Trailblazer) .
6. Install the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement (Service and Repair) .




7. Install the inlet radiator hose to the radiator.
8. Reposition the inlet radiator hose clamp using J 38185 .
9. Raise the vehicle.




10. Install the outlet radiator hose (1) to the radiator.
11. Reposition the outlet radiator hose clamp (1) using J 38185 .
12. 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.
13. Install the lower radiator support shield, if equipped. Refer to Radiator Support Shield Replacement .
14. Lower the vehicle.
15. Fill the cooling system. Refer to Cooling System Draining and Filling (LL8) (Service and Repair)Cooling System Draining and Filling (LH6, LS2) (Service and Repair) .