How to replace the Heater Core (Heat Only) on Chevrolet Silverado 3500?

Begin Heat Only Heater Core replacement by first taking out the heater/vent module before removing the screws holding the heater core cover and extracting the cover itself. You should first remove the heater core and install a new one before investing the heater core cover. Before tightening the heater core cover screws be sure to read and follow the Fastener Notice in Service Precautions. The screws need to be tightened to 1.6 N.m (14 lb in). Finally, reinstall the heater/vent module.

OEM Chevrolet Silverado 3500 Heater Core

HVAC Heater Core

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Chevrolet Silverado 3500 Heater Core Part Number: 89018297
$158.42 MSRP: $325.56
You Save: $167.14 (52%)
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Product Specifications
- Other Name: Core, Heater Core; HVAC Heater Core
- Replaces: 52473326, 52473322
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 Chevrolet Silverado 3500 | Base, LS, LT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
View related parts
Chevrolet Silverado 3500 Heater Core Part Number: 19258989
$154.99 MSRP: $278.00
You Save: $123.01 (45%)
Product Specifications
- Other Name: Core, Heater Core
- Replaces: 88986627
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2006 Chevrolet Silverado 3500 | Base, LS, LT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS

Chevrolet Silverado 3500 Heater Core

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Chevrolet Silverado 3500 Heater Core Parts and Q&A

Heater Core
19258989
Q: How to replace the Heater Core (Heat Only) on Chevrolet Silverado 3500?
A:
Begin Heat Only Heater Core replacement by first taking out the heater/vent module before removing the screws holding the heater core cover and extracting the cover itself. You should first remove the heater core and install a new one before investing the heater core cover. Before tightening the heater core cover screws be sure to read and follow the Fastener Notice in Service Precautions. The screws need to be tightened to 1.6 N.m (14 lb in). Finally, reinstall the heater/vent module.