GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Battery Disconnect Caution in the Preface section.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Partially drain the engine coolant from the cooling system. Refer to Cooling System Draining and Filling .

  3. Object Number: 305329  Size: SH
  4. Disconnect the wiring harness connector from the coolant level module (2).

  5. Object Number: 163296  Size: SH
  6. To unlock the coolant module, perfrom the following:
  7. 4.1. Lift one leg of the snap clip from its locked position.
    4.2. Pull outward with a slight twisting motion.
  8. Remove the coolant level module.
  9. Inspect the O-ring seal on the coolant level module.

Installation Procedure


    Object Number: 163296  Size: SH
  1. Install the O-ring. Lubricate the O-ring seal with engine coolant.
  2. Place the snap clip leg in place.
  3. Install the coolant level module.

  4. Object Number: 305329  Size: SH
  5. Connect the wiring harness connector to the coolant level module (2).
  6. Important: To properly fill the system requires the use the air bleed vents.

  7. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling .
  8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  9. Inspect for leaks.