TrailBlazer 4WD L6-4.2L VIN S (2002)
Heater Core: Service and Repair
Heater Core Replacement
REMOVAL PROCEDURE
1. Remove the HVAC module assembly. See: Housing Assembly HVAC/Service and Repair/HVAC Module Assembly Replacement
2. Remove the heater core access cover screws.
3. Remove the heater core access cover.
4. Remove the heater core (2) from the HVAC module assembly (1).
INSTALLATION PROCEDURE
1. Install the heater core (2) to the HVAC module assembly (1).
2. Install the heater core access cover.
NOTE: Refer to Fastener Notice in Service Precautions.
3. Install the heater core access cover screws.
Tighten
Tighten the screws to 1.9 N.m (17 lb in).
4. Install the HVAC module assembly. See: Housing Assembly HVAC/Service and Repair/HVAC Module Assembly Replacement