Removal Procedure

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
Raise and support the vehicle. Refer to LIFTING & JACKING VEHICLE .

Fig 1: Auxiliary Heater Hoses At Auxiliary Heater Core Pipes

Courtesy of GENERAL MOTORS CORP.

Disconnect the auxiliary heater hoses from the auxiliary heater core pipes.
Lower the vehicle.
Remove the left rear quarter trim panel. Refer to TRIM PANEL REPLACEMENT - REAR QUARTER LOWER .

Fig 2: Auxiliary Heater Pipe Clamp

Courtesy of GENERAL MOTORS CORP.

Remove the auxiliary heater pipe clamp screw.
Remove the auxiliary heater pipe clamp.
Disconnect the auxiliary inlet heater hose clamps.
Slide the hose clamps up onto the heater core pipe.
Loosen the auxiliary inlet heater hose at the heater core.
Slide the heater hose and pipe extension downward.
Disconnect the auxiliary outlet heater hose clamps.
Slide the hose clamps up onto the heater core pipe.
Loosen the auxiliary outlet heater hose at the heater core.
Slide the heater hose and pipe extension downward.

Fig 3: Auxiliary Heater

Courtesy of GENERAL MOTORS CORP.

Remove the auxiliary heater core mounting screws.
Remove the auxiliary heater core from the HVAC module assembly.

Fig 4: Auxiliary Heater Core

Courtesy of GENERAL MOTORS CORP.

Remove the heater core mounting bracket from the auxiliary heater core.