Removal Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
Disconnect the engine coolant heater cord from the engine coolant heater.

Fig 1: Removing Engine Coolant Heater & Cord
Courtesy of GENERAL MOTORS CORP.
Loosen the engine coolant heater bolt. Do not remove the engine coolant heater bolt.
Remove the engine coolant heater.
Clean the engine coolant heater opening.