How to replace the heater core-auxiliary on Chevrolet Trailblazer?

The repair of the heater core-auxiliary begins with HVAC module-auxiliary removal. Begin by removing two screws from the heater core cover-auxiliary before procuring the cover part itself. Next follow step by step procedures to divide and remove the heater core-auxiliary from its position inside the HVAC module-auxiliary. Follow these steps when installing the heater core-auxiliary: first return it into the HVAC module-auxiliary and then secure the HVAC module pass thru seal-auxiliary. Secure the heater core access cover-auxiliary to the HVAC module-auxiliary by installing screws that should be tightened up to 2 N.m (18 lb in). As a final step replace the rear HVAC module-auxiliary.

OEM Chevrolet Trailblazer Heater Core

HVAC Heater Core

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5 Heater Cores found

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Chevrolet Trailblazer Heater Core Part Number: 88892978
$49.20 MSRP: $92.39
You Save: $43.19 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Core, Heater Core; Auxiliary Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS
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Chevrolet Trailblazer Heater Core Part Number: 42677734
$54.69 MSRP: $102.70
You Save: $48.01 (47%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Core Assembly-Heater; Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Chevrolet Trailblazer | ACTIV, L, LS, LT, RS | 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Chevrolet Trailblazer Heater Core Part Number: 52498633
Product Specifications
- Other Name: Core, Heater; HVAC Heater Core; Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2009 Chevrolet Trailblazer | Base, LS, LT, LTZ, North Face, SS | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Heater Core Part Number: 89023339
Product Specifications
- Other Name: Core, Heater Core; Auxiliary Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2007 Chevrolet Trailblazer | LS, LT, SS | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Heater Core Part Number: 52495721
Product Specifications
- Other Name: Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS

Chevrolet Trailblazer Heater Core

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The Heating Cores in the Chevrolet Trailblazer are part of the climate control system, and it acts as a conventional radiator where the Heater Core takes the extra heat generated in the engine to demystify the interiors. Manufactured from aluminum or brass, the core has fins for a greater surface exposure to be cooled by a water and antifreeze mix, operating at the engine's temperature. In this case, the vehicle's fan directs air over the core to warm the cabin air. Some systems utilize valves or doors when it comes to regulation of temperature, and some have additional features that comprise of dual climate for comfort. In vehicles with air conditioning systems, a heater core is used to warm the air that has been cooled by evaporator coils improving dehumidification. Problems range from blockage, cracking, and rusting, repairs touching on the dashboard, are usually complicated.

Chevrolet Trailblazer Heater Core Parts and Q&A

Heater Core
88892978
Q: How to replace the heater core-auxiliary on Chevrolet Trailblazer?
A:
The repair of the heater core-auxiliary begins with HVAC module-auxiliary removal. Begin by removing two screws from the heater core cover-auxiliary before procuring the cover part itself. Next follow step by step procedures to divide and remove the heater core-auxiliary from its position inside the HVAC module-auxiliary. Follow these steps when installing the heater core-auxiliary: first return it into the HVAC module-auxiliary and then secure the HVAC module pass thru seal-auxiliary. Secure the heater core access cover-auxiliary to the HVAC module-auxiliary by installing screws that should be tightened up to 2 N.m (18 lb in). As a final step replace the rear HVAC module-auxiliary.