Installation Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

If re-using the old coolant heater, apply thread sealant GM P/N 12346004
(Canadian P/N 10953480), or equivalent to the threads.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the coolant heater to the engine block.
Tighten

Tighten the coolant heater to 50 N.m (37 lb ft).

Fig 1: Installing Coolant Heater To Engine Block
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 coolant heater (1) electrical connector.
Lower the vehicle.
Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 6) or DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 3) .

Fig 2: Connecting Coolant Heater Electrical Connector
Courtesy of GENERAL MOTORS CORP.