GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 LeSabre 🢒 Engine 🢒 Engine Cooling 🢒 Radiator Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Drain the engine coolant. Refer to Cooling System Draining and Filling .

    3. Object Number: 46149 Size: SH
  3. Remove the upper fan mounting bolts.

    4. Object Number: 46159 Size: SH
  4. Remove the upper radiator panel.

    5. Object Number: 46149 Size: SH
  5. Disconnect the radiator hoses from the radiator.
  6. Disconnect the coolant recovery hose from the radiator neck.
  7. Disconnect the electric cooling fan electric connector.

    8. Object Number: 46169 Size: SH
  8. Disconnect the transaxle oil cooler lines from the radiator side tank.

    9. Object Number: 46162 Size: SH
  9. Remove the radiator from the vehicle.

Installation Procedure

    Object Number: 46162 Size: SH
  1. Install the radiator to the vehicle. Place the bottom of the radiator in the lower pads.

    2. Object Number: 46169 Size: SH
  2. Connect the transaxle oil cooler lines to the radiator.

    3. 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.

  3. Tighten the transaxle oil cooler lines to the radiator.

    4. Tighten
    Tighten the transaxle oil cooler line fittings to 27 N·m (20 lb ft).


    Object Number: 46159 Size: SH
  4. Install the upper radiator panel.

    5. Tighten
    Tighten the upper radiator panel mounting bolts to 10 N·m (89 lb in).

  5. Connect the radiator hoses to the radiator.
  6. Connect the coolant recovery hose to the radiator neck.

    7. Object Number: 46149 Size: SH
  7. Install the cooling fan assembly and the fan attaching bolts.

    8. Tighten
    Tighten the cooling fan bolts to 10 N·m (89 lb in).

  8. Connect the fan connector.
  9. Refill the engine coolant. Refer to Cooling System Draining and Filling .
  10. Connect the negative battery cable.
  11. Check for leaks.