How to replace the auxiliary heater core on Chevrolet Trailblazer?

The HVAC module-auxiliary requires removal before starting the heater core auxiliary replacement process. The heater core cover-auxiliary that is attached to the HVAC module-auxiliary needs its screws removed before the cover-auxiliary can be taken out. To proceed with the heater core-auxiliary replacement you need to separate the HVAC module pass thru seal-auxiliary followed by the removal of the heater core-auxiliary from the HVAC module-auxiliary. Begin Heater core-auxiliary installation by placing it into the HVAC module-auxiliary and then add the HVAC module pass thru seal-auxiliary. Seam the heater core access cover-auxiliary onto the HVAC module-auxiliary and implement screws which should be tightened to 2 N.m (18 lb in). Finally, reinstall the 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
$51.74 MSRP: $92.39
You Save: $40.65 (44%)
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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
$57.51 MSRP: $102.70
You Save: $45.19 (44%)
Ships in 1-3 Business Days
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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 Questions & Experts Answers

Heater Core
52498633
Q: How to replace the auxiliary heater core on Chevrolet Trailblazer?
A:
The HVAC module-auxiliary requires removal before starting the heater core auxiliary replacement process. The heater core cover-auxiliary that is attached to the HVAC module-auxiliary needs its screws removed before the cover-auxiliary can be taken out. To proceed with the heater core-auxiliary replacement you need to separate the HVAC module pass thru seal-auxiliary followed by the removal of the heater core-auxiliary from the HVAC module-auxiliary. Begin Heater core-auxiliary installation by placing it into the HVAC module-auxiliary and then add the HVAC module pass thru seal-auxiliary. Seam the heater core access cover-auxiliary onto the HVAC module-auxiliary and implement screws which should be tightened to 2 N.m (18 lb in). Finally, reinstall the HVAC module-auxiliary.