How to replace the heater core in a Visteon system on 2003 Chevrolet Avalanche 1500?

To change the heater core in a Visteon system, one needs to first unbolster the HVAC module assembly. The screws on the heater core cover can then be removed and the cover taken out. Unscrew the gasket to the heater core cowl and detach the heater core. To install, reverse the process and make all the arrangements.

OEM 2003 Chevrolet Avalanche 1500 Heater Core

HVAC Heater Core

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2 Heater Cores found

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2003 Chevrolet Avalanche 1500 Heater Core Part Number: 89018297
$158.42 MSRP: $325.56
You Save: $167.14 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater Core; HVAC Heater Core
- Replaces: 52473326, 52473322
- Item Weight: 4.10 Pounds
- Item Dimensions: 20.6 x 16.3 x 8.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89018297
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2003 Chevrolet Avalanche 1500 Submodels:
- Base, LS, LT, North Face, On Road Edition, WBH, Z66, Z71 | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
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2003 Chevrolet Avalanche 1500 Heater Core Part Number: 19258989
$148.98 MSRP: $278.00
You Save: $129.02 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core, Heater Core
- Replaces: 88986627
- Item Weight: 2.90 Pounds
- Item Dimensions: 14.1 x 13.8 x 7.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 19258989
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Avalanche 1500 Submodels:
- Base, LS, LT, North Face, On Road Edition, WBH, Z66, Z71 | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS

2003 Chevrolet Avalanche 1500 Heater Core

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2003 Chevrolet Avalanche 1500 Heater Core Parts and Q&A

Q: How to replace the heater core in a Visteon system on 2003 Chevrolet Avalanche 1500?
A: To change the heater core in a Visteon system, one needs to first unbolster the HVAC module assembly. The screws on the heater core cover can then be removed and the cover taken out. Unscrew the gasket to the heater core cowl and detach the heater core. To install, reverse the process and make all the arrangements.