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.

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 (4.2L Engine)
Courtesy of GENERAL MOTORS CORP.
Install the coolant heater cord to the heater (2).

Fig 2: Installing Coolant Heater Cord To Heater (4.2L Engine)
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the engine harness bracket and secure the bracket with the bolt.
Tighten

Tighten the engine harness bracket bolt to 45 N.m (33 lb ft).
Secure the harnesses to the bracket.
Install the PCM. Refer to POWERTRAIN CONTROL MODULE .
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 3: Installing Engine Harness To Bracket (4.2L Engine)
Courtesy of GENERAL MOTORS CORP.