GM Service Manual Online
For 1990-2009 cars only

Radiator Replacement LTD/U20XE, LE5/U24XE

Removal Procedure

Warning: With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result.

  1. Turn the ignition OFF.
  2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  3. Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement.
  4. Drain the cooling system. Refer to Cooling System Draining and Filling.
  5. Remove the air cleaner outlet duct.
  6. • Vehicles equipped with LTD/U20XE. Refer to Air Cleaner Outlet Duct Replacement.
    • Vehicles equipped with LE5/U24XE. Refer to Air Cleaner Outlet Duct Replacement.
  7. Remove the radiator air side baffle and radiator air lower baffle. Refer to Radiator Air Lower Baffle and Deflector Replacement.
  8. Note: Secure the air conditioning condenser with cable ties.

  9. Remove the air conditioning compressor and the condenser hose and the air conditioning evaporator hose. Refer to Air Conditioning Compressor and Condenser Hose Replacement and Air Conditioning Evaporator Hose Assembly Replacement.
  10. Remove the radiator inlet hose from the radiator.
  11. Remove the radiator outlet hose from the radiator.
  12. Remove the engine coolant fan motor wiring harness from the radiator.
  13. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  14. Note: Secure the power steering fluid cooler with cable ties.

  15. Remove the bracket of the power steering fluid cooler. Refer to Power Steering Fluid Cooler Replacement.
  16. Note: Secure the transmission fluid cooler pipe with cable ties.

  17. Remove the transmission fluid cooler inlet hose and transmission fluid cooler outlet hose from the radiator. Refer to Fluid Cooler Inlet Hose Replacement and Fluid Cooler Outlet Hose Replacement.

  18. Object Number: 2020077  Size: SH
  19. With the aid of an assistant remove the radiator support brackets (1).
  20. Remove the radiator wiring harness connectors.

  21. Object Number: 1202420  Size: SH
  22. Remove the radiator.
  23. Remove the engine coolant fan shroud from the radiator. Refer to Engine Coolant Fan Shroud Replacement.

Installation Procedure

Caution: Refer to Fastener Caution in the Preface section.

  1. Install the engine coolant fan shroud to the radiator. Refer to Engine Coolant Fan Shroud Replacement.

  2. Object Number: 1202420  Size: SH
  3. With the aid of an assistant install the radiator.

  4. Object Number: 2020077  Size: SH
  5. Install the radiator support bracket (1).
  6. Tighten
    25 N·m (15 lb ft).

  7. Install the radiator wiring harness connectors.
  8. Install the radiator outlet hose to the radiator.
  9. Install the radiator inlet hose to the radiator.
  10. Install the engine coolant fan motor wiring harness to the radiator.
  11. Install the transmission fluid cooler inlet hose and transmission fluid cooler outlet hose to the radiator. Refer to Fluid Cooler Inlet Hose Replacement and Fluid Cooler Outlet Hose Replacement.
  12. Install the air conditioning compressor and the condenser hose and the air conditioning evaporator hose. Refer to Air Conditioning Compressor and Condenser Hose Replacement and Air Conditioning Evaporator Hose Assembly Replacement.
  13. Install the bracket of the power steering fluid cooler. Refer to Power Steering Fluid Cooler Replacement.
  14. Install the radiator air side baffle and the radiator air lower baffle.
  15. Install the air cleaner outlet duct.
  16. • Vehicles equipped with LTD/U20XE. Refer to Air Cleaner Outlet Duct Replacement.
    • Vehicles equipped with LE5/U24XE. Refer to Air Cleaner Outlet Duct Replacement.
  17. Install the front bumper fascia. Refer to Front Bumper Fascia Replacement.
  18. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  19. Fill the Cooling system. Refer to Cooling System Draining and Filling.