Product Description
Delco 12514334 Thermostat 131-87
Made in USA
The GM part number 12514334 is an Engine Coolant Thermostat, typically an Original Equipment (OE) part cross-referenced to ACDelco 131-87. The temperature rating is generally 195°F (90.5°C). This thermostat has a massive range of applications, primarily fitting V8 engines (5.0L, 5.7L, 7.4L) and some L4 engines in trucks, vans, and muscle cars.
| Vehicle Make | Vehicle Model | Years | Engine Size | Part Number | OEM Numbers | Special Notes |
| Chevrolet Trucks | C1500, K1500, C2500, K2500, C3500, K3500 | 1988-2000 | 5.0L V8, 5.7L V8, 7.4L V8, 6.2L/6.5L Diesel | 12514334 | 131-87 | Heavy Truck Use: Fits most light-duty and heavy-duty C/K (GMT400) trucks and Suburban/Blazer models. |
| GMC Trucks | Sierra, Yukon, Jimmy, Safari, G-Series Vans | 1985-2000 | 5.0L V8, 5.7L V8, 7.4L V8, 2.5L L4 | 12514334 | 12514334 | Fits full-size Sierra pickups and SUVs, as well as the mid-size Astro/Safari van line with the 2.5L L4. |
| Chevrolet | Camaro | 1985-1992 | 5.0L V8 (305ci), 5.7L V8 (350ci) | 12514334 | 12514334 | Fits TPI/TBI V8 engines in the 3rd Gen F-Body (Camaro/Firebird). |
| Pontiac | Firebird / Trans Am / GTA | 1985-1992 | 5.0L V8 (305ci), 5.7L V8 (350ci) | 12514334 | ACDelco 131-87 | Fits all V8 trims for these years. |
| Chevrolet | Corvette (C3/C4) | 1978-1991 | 5.7L V8 (350ci) | 12514334 | 12514334 | Fits C3 and C4 Corvette models. 195°F opening temperature. |
| Workhorse | P-Series Chassis | Specific Years | 7.4L V8, 8.1L V8 | 12514334 | 12514334 | Used in various commercial/RV chassis applications built by Workhorse (which used GM powertrains). |
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Please look over the images carefully, as they provide the best description of the exact part you will receive. Please do your own due diligence to ensure this part is correct for your application before purchase.
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NOS (New Old Stock) parts available – Get them while they last!
Restore your classic car with authentic, high-quality Made in the USA vintage auto parts. We offer a wide selection of NOS (New Old Stock) parts, including many that are no longer available elsewhere. Our parts are sourced from closed auto parts stores and manufacturers, ensuring you get the correct, unused parts you need. Unless stated otherwise, parts are classified as "New Other," meaning they are new and unused, but may have opened original packaging and show signs of age or storage.
What to Expect
Each part is carefully inspected and photographed to provide you with an accurate representation of its condition. We use detailed descriptions and multiple images so you can make informed decisions. While most parts are new, their packaging may have been opened for inspection or photography. Boxes may be torn, missing, or show signs of wear.
Important Notes
- Fitment: We strive for accuracy, but our fitment information is based on older catalogs and may contain errors. Please do your own due diligence and research the item yourself to make sure it's the correct part for your application BEFORE purchase.
- Returns: We accept returns on defective items. Please double-check compatibility before purchasing, as we cannot accept returns for misordered parts.
- Completeness: We do our best to ensure all parts are complete, but due to their age, some small components like gaskets may be missing or brittle, cotter pins, or nuts may be missing.
- No Warranty: We do not offer a warranty, expressed or implied. Any existing manufacturer warranty is between you and the manufacturer.
- No Advice: We are not mechanics and cannot provide repair or installation advice.
