Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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 in Cautions and Notices.
Install the engine block heater into the block.
Tighten: Tighten the coolant heater to 60 N.m (40 lb ft).

Fig 1: View Of Engine Block Coolant 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.

Fig 2: View Of Block Heater Cord (8.1L)

Courtesy of GENERAL MOTORS CORP.

Fill the cooling system. Refer to Draining and Filling Cooling System (without HP2) .