GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 636718  Size: SH

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Partially drain the radiator. Refer to Cooling System Draining and Filling .

  3. Disconnect the low coolant module electrical connector.
  4. In order to unlock the low coolant module, lift one leg of the snap clip from the locked position and pull outward with a slight twisting motion.
  5. Remove the low coolant module.

Installation Procedure


    Object Number: 636718  Size: SH
  1. Install the O-ring. Lubricate the O-ring seal with coolant.
  2. Position the snap clip leg in place.
  3. Install the low coolant module.
  4. Connect the low coolant module electrical connector.
  5. Fill the radiator. Refer to Cooling System Draining and Filling .
  6. Connect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection .
  7. Inspect for leaks.