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Four SeasonsPart #: 91487
Four Seasons 91487 HVAC Heater Core
⚙️ 6 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$114.52Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Core
🚗Fitment: Chevrolet and GMC, S10, S10 Blazer, and S15
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all HVAC Heater Core options
Four Seasons 91487 HVAC Heater Core
| Brand | Four Seasons |
| Part Number | 91487 |
| Position | Heater Core |
| Length | 8 |
| Thickness | 2 |
| Width | 6-1/4 |
| Core Material | Copper |
| Adjustable Pipe Positioning | No |
| Core Depth IN | 2.000 |
| Core Height IN | 8.000 |
| Core Width IN | 6.250 |
| Description | Heater cores |
| Meets / Exceeds OEM? | Yes |
| Style | Copper/brass 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 /copper brass |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1985 | Chevrolet | S10 | 2.2L | L4 | DIESEL | N/A | Heater Core |
| 1985 | GMC | S15 | 2.2L | L4 | N/A | Heater Core | |
| 1984 | Chevrolet | S10 | 2.2L | L4 | DIESEL | N/A | Heater Core |
| 1984 | Chevrolet | S10 Blazer | 2.2L | L4 | DIESEL | N/A | Heater Core |
| 1984 | GMC | S15 | 2.2L | L4 | DIESEL | N/A | Heater Core |
| 1983 | Chevrolet | S10 | 2.2L | L4 | DIESEL | N/A | 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:
15600422504652516279176305684839824455448766035327024677091648244901030090516914879448798487E812079GM6206GM8244H6206HT398244ZH465
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.