Removal 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 equipped with a 4.2L engine, remove the PCM. Refer to POWERTRAIN CONTROL MODULE .
Remove the coolant heater cord from the engine harness bracket (1).
Remove the coolant heater cord from the coolant heater (2).

Fig 1: Removing Coolant Heater Cord From Engine Harness Bracket & Coolant Heater
Courtesy of GENERAL MOTORS CORP.
If equipped with a 5.3L engine, disconnect the coolant heater cord from the coolant heater (1).
Remove the coolant heater cord clip from the engine harness.

Fig 2: Removing Coolant Heater Cord Clip From Engine Harness
Courtesy of GENERAL MOTORS CORP.
Disconnect the coolant heater cord retainers (1) from the battery cover.

Fig 3: Disconnecting Coolant Heater Cord Retainers From Battery Cover
Courtesy of GENERAL MOTORS CORP.