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Four Seasons 90484 HVAC Heater Core
Reliable Heater Core Replacement for Chevrolet and GMC Trucks
The Four Seasons Heater Core part number 90484 is designed to restore efficient heating performance in select Chevrolet and GMC trucks. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation for your vehicle's HVAC system.
- Core dimensions: 8-1/4 inches length, 7-1/4 inches width, 1 inch thickness
- Constructed from corrosion-resistant aluminum material
- Compatible with Chevrolet and GMC C15, C35, C1500, C2500, C3500, K1500, K2500, and K3500 models
- Meets or exceeds OEM specifications for reliable fit and function
- Includes two tubes: 0.625 inch (15.875 mm) and 0.750 inch (19.050 mm) diameter
Four Seasons Heater Core Product Line Overview
The Four Seasons Heater Core line focuses on providing high-quality HVAC heater cores designed to meet or exceed original equipment manufacturer standards. This product line emphasizes durable aluminum cores that offer efficient heat exchange and corrosion resistance, making them suitable replacements for aging or damaged heater cores in various vehicle applications.
Product Details and Specifications
This HVAC heater core features a core height of 8.25 inches, width of 7.25 inches, and a depth of 1 inch, providing a precise fit for the specified Chevrolet and GMC truck models. The aluminum core material enhances heat transfer efficiency while resisting corrosion over time. The heater core includes two inlet and outlet tubes with diameters of 0.625 inches and 0.750 inches respectively, designed for secure connection within the vehicle's heating system. Note that this model does not have adjustable pipe positioning.
Common Applications and Issues Addressed
- Restores heating performance in Chevrolet C1500 and GMC K1500 trucks
- Replaces leaking or clogged heater cores causing coolant loss
- Eliminates insufficient cabin heat due to core blockages
- Prevents engine overheating related to heater core failures
- Resolves unpleasant odors from damaged or corroded cores
Installation Notes and Tips
When installing the Four Seasons Heater Core 90484, ensure compatibility with your specific Chevrolet or GMC truck model. Properly drain the cooling system before removal to avoid spills. Handle the aluminum core carefully to prevent damage to the fins and tubes. Verify hose connections match the 0.625 inch and 0.750 inch tube sizes for a secure fit. Consult vehicle service manuals for detailed removal and installation procedures.
Quality Assurance and Warranty
This heater core meets or exceeds OEM standards, ensuring reliable performance and fitment. Four Seasons products are manufactured under strict quality controls to provide durability and consistent operation. Please refer to Four Seasons' official warranty policy for coverage details related to this heater core.
| Brand | Four Seasons |
| Part Number | 90484 |
| Position | Heater Core |
| Length | 8-1/4 |
| Thickness | 1 |
| Width | 7-1/4 |
| Core Material | Aluminum |
| Adjustable Pipe Positioning | No |
| Core Depth IN | 1.000 |
| Core Height IN | 8.250 |
| Core Width IN | 7.250 |
| Description | Heater cores |
| Meets / Exceeds OEM? | Yes |
| Style | Aluminum heater core |
| Tube 1 IN | 0.625 |
| Tube 1 MM | 15.875 |
| Tube 2 IN | 0.750 |
| Tube 2 MM | 19.050 |
| Type | Heater core /aluminum |
This part fits 35 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1991 | Chevrolet | C1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | C2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | C35 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | C3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | K1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | K2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Chevrolet | K3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | C1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | C2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | C35 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | C3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | K1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | K2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Chevrolet | K3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | C1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | C2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | C3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | K1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | K2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | GMC | K3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | C1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | C2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | C35 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | C3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | K1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | K2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Chevrolet | K3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | C15 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | C1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | C2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | C35 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | C3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | K1500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | K2500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Chevrolet | K3500 | N/A | Compatible with models that do not have air conditioning.; Heater Core |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.