GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Jimmy - 2WD 🢒 Engine 🢒 Engine Cooling 🢒 Radiator Replacement

Removal Procedure

    Object Number: 395873 Size: SH
  1. Drain the coolant from the radiator.
  2. Disconnect the coolant recovery reservoir hose.
  3. Loosen the radiator hose clamps.
  4. Disconnect the (upper) radiator inlet hose from the radiator.
  5. Remove the upper fan shroud. Refer to Fan Shroud Replacement .

    6. Object Number: 343903 Size: SH
  6. Disconnect the radiator hoses from the radiator (2.2L, RWD Pickups).

    7. Object Number: 343920 Size: SH
  7. Disconnect the radiator hoses from the radiator (4.3L, 4WD).
  8. Disconnect the engine oil cooler lines from the radiator (if equipped). Refer to Engine Oil Cooler Hose/Pipe Replacement
  9. Disconnect the transmission oil cooler lines from the radiator, if equipped.
  10. Lift the lower fan shroud just enough to disengage the locating tabs.

    11. Object Number: 1363 Size: SH
  11. Remove the radiator by lifting the radiator up and out of the vehicle.
  12. Inspect all sealing surfaces for deterioration or signs of leakage.

Installation Procedure
  1. Place the lower fan shroud in position under the cooling fan. Refer to Fan Shroud Replacement .

    2. Object Number: 1363 Size: SH
  2. Install the radiator onto the rubber mounts in the vehicle.
  3. Connect the engine oil cooler line nuts to the radiator, if equipped. Refer to Engine Oil Cooler Hose/Pipe Replacement

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Connect the transmission oil cooler line nuts to the radiator, if equipped.

    5. Tighten
    Tighten the oil cooler line nuts to 24 N·m (18 lb ft).


    Object Number: 343903 Size: SH
  5. Connect the radiator hoses to the radiator (2.2L, RWD Pickups).

    6. Object Number: 343920 Size: SH
  6. Connect the radiator hoses to the radiator (4.3L, 4WD).
  7. Fasten the upper fan shroud to the lower fan shroud. Refer to Fan Shroud Replacement .

    8. Object Number: 395873 Size: SH
  8. Connect the coolant recovery reservoir hose to the radiator.
  9. Fill the radiator with the specified coolant and concentration. Refer to Cooling System Draining and Filling
  10. Inspect the cooling system for leaks. Refer to Cooling System Leak Testing .