Installation Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Removing/Installing Coolant Heater From Engine Block

Courtesy of GENERAL MOTORS CORP.

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 2: Disconnecting/Connecting Coolant Heater Electrical Connector

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 (LL8) or Draining and Filling Cooling System (LM4) .