Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Coat the O-ring seal and the cleaned surface of the plug opening with water resistant high-temperature grease GM P/N United States 1052196, GM P/N Canada 5264008, or the equivalent.
Important: Avoid element contact with the inside walls of the engine block.
Tightly push the coolant heater (1) into the engine block.

Fig 1: Installing Coolant Heater Into Engine Block
Courtesy of GENERAL MOTORS CORP.
Tighten the bolt on the engine coolant heater until both of the locking wings draw tightly against the inner wall of the engine block. Tighten the bolt in order to retain the engine coolant heater to the engine block to 2 N.m (18 lb in).
NOTE: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.
Connect the heater cord to the coolant heater (4).
Fill the cooling system. Refer to Draining & Filling Cooling System .
Inspect the cooling system for leaks.