How to replace the auxiliary heater core on 2003 Chevrolet Astro?

In order to change the auxiliary heater core, one has to drain out the engine coolant and take off the front lower trim panel. Unplug the pipes to the heater module, unscrew and unclam, and unscrew the heater core. Replace the seals, screw in the core, reconnect the pipes and refill the system with coolant.

OEM 2003 Chevrolet Astro Heater Core

HVAC Heater Core

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2 Heater Cores found

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2003 Chevrolet Astro Heater Core Part Number: 89018963
Product Specifications
- Other Name: Core Assembly, Auxiliary Heater; Auxiliary Heater Core; Core, Heater Core
- Replaces: 52470518
- Item Weight: 3.10 Pounds
- Item Dimensions: 17.1 x 13.5 x 7.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89018963
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2003 Chevrolet Astro Submodels:
- Base, CL, CS, LS, LT | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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2003 Chevrolet Astro Heater Core Part Number: 52474642
Product Specifications
- Other Name: Core, Heater; HVAC Heater Core; Core, Heater Core
- Item Weight: 5.00 Pounds
- Item Dimensions: 20.6 x 16.1 x 8.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 52474642
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Astro Submodels:
- Base, LS, LT | 6 Cyl 4.3 L GAS

2003 Chevrolet Astro Heater Core

With a comprehensive array of OEM 2003 Chevrolet Astro Heater Core, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2003 Chevrolet Astro Heater Core are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2003 Chevrolet Astro Heater Core Parts and Q&A

Q: How to replace the auxiliary heater core on 2003 Chevrolet Astro?
A: In order to change the auxiliary heater core, one has to drain out the engine coolant and take off the front lower trim panel. Unplug the pipes to the heater module, unscrew and unclam, and unscrew the heater core. Replace the seals, screw in the core, reconnect the pipes and refill the system with coolant.