Auxiliary Heater Core Replacement Tahoe/Yukon
Removal Procedure
- Remove the auxiliary HVAC module (4) from the vehicle. Refer to
Auxiliary HVAC Module Replacement
- Remove the air temperature actuator (1) from the auxiliary HVAC module.
- Remove the heater core cover (1) from the auxiliary HVAC module.
- Remove the heater core (1) from the auxiliary HVAC module.
Installation Procedure
- Install the heater core (1) to the auxiliary HVAC module.
- Install the heater core cover (1) to the auxiliary HVAC module.
- Install the air temperature actuator (1) to the auxiliary HVAC module.
- Install the auxiliary HVAC module assembly (4) to the vehicle. Refer to
Auxiliary HVAC Module Replacement
Auxiliary Heater Core Replacement Suburban/Yukon XL
Removal Procedure
- Remove the auxiliary HVAC module (3) from the vehicle. Refer to
Auxiliary HVAC Module Replacement
.
- Remove the air temperature actuator (1) from the auxiliary HVAC module.
- Remove the stud on the underside of the auxiliary HVAC module between the heater core inlet and outlet pipes.
- Carefully separate the heater core pipe gasket from the module case and remove the heater core pipe retainer.
- Remove the auxiliary HVAC module lower cover.
- Remove the heater core clamp.
- Remove the heater core from the auxiliary HVAC module.
Installation Procedure
- Install the heater core to the auxiliary HVAC module.
- Install the heater core clamp.
- Install the auxiliary HVAC module lower cover.
- Install the heater core pipe retainer and gasket.
- Install the stud between the heater core inlet and outlet on the underside of the rear HVAC module.
- Install the air temperature actuator (1) to the auxiliary HVAC module.
- Install the auxiliary HVAC module assembly (3) to the vehicle.