GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle. Support the vehicle. Refer to General Vehicle Lifting and Jacking in General Information.
  2. Open the radiator drain cock. Drain the coolant from the radiator to a level below the coolant level indicator module.
  3. Lower the vehicle.
  4. 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.

  5. Remove the battery. Refer to Battery Replacement in Battery.
  6. Disconnect the electrical connector at the module.
  7. Remove the coolant level indicator module from the radiator.

Installation Procedure

  1. Install the module to the radiator.
  2. 1.1. Apply lubricant to the O-ring.
    1.2. Align the coolant indicator module to the module port in the radiator.
    1.3. Press the module probe into the radiator module port housing until the retainer spring snaps onto the port flange.
  3. Connect the electrical connector at the module.
  4. Install the battery. Refer to Battery Replacement in Battery.
  5. Refill the engine coolant. Refer to Cooling System Draining and Filling .