Removal Procedure

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Remove the battery.
Partially drain the cooling system. Refer to Draining and Filling Cooling System
Disconnect the coolant level sensor electrical connector.
Important: In order to unlock the coolant level sensor, lift one leg of the snap clip from its locked position and pull outward with a slight twisting motion.
Remove the coolant level sensor.

Fig 1: Coolant Level Sensor
Courtesy of GENERAL MOTORS CORP.