Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Apply sealant GM P/N 12346004, (Canadian P/N 10953480), or equivalent to the threads of the engine block heater.
NOTE: Refer to FASTENER NOTICE .
Install the engine block heater into the block.
Tighten

Tighten the coolant heater to 60 N.m (40 lb ft).

Fig 1: Install Engine Block Heater
Courtesy of GENERAL MOTORS CORP.

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 block heater cord to the block heater.
Fill the cooling system. Refer to Draining and Filling Cooling System .

Fig 2: Connect Block Heater Cord
Courtesy of GENERAL MOTORS CORP.