GM Service Manual Online
For 1990-2009 cars only

Object Number: 1816518  Size: MF

Callout

Component Name

Preliminary Procedure

  1. Remove the thermal expansion valve. Refer to Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement .
  2. Remove the auxiliary HVAC module. Refer to Auxiliary HVAC Module Replacement
  3. Disconnect the electrical connectors.

1

Auxiliary Heater Core Cover Screw (Qty: 6).

Notice: Refer to Fastener Notice in the Preface section.

Tighten
1.5 N·m (13 lb in)

2

Auxiliary Heater Core Cover

3

Auxiliary Heater Core Assembly

Tip
Ensure the heater core gasket is in good condition upon installation.