77-87 Chevy/GMC Pickup Truck 21 Inch Aluminum Radiator AT and 12 Inch Fan Kit Cold Case Radiators
1977-1987 Chevy/GMC Truck Aluminum Performance Radiator.
This is the radiator that is 21 inches high overall. For the 19 inches high version, see GMT556AK
These COLD-CASE radiators are Tig welded 100 percent aluminum and absolutely beautiful.
Don't buy a 3 or 4 row aluminum radiator! It doesn't cool as good as these oversize 2 row models. These radiators are original appearing and have the correct stamping. Once painted, you'd be hard pressed to find a difference over an original versus a COLD-CASE.
Fits:
1977-1987 Chevy/GMC Truck
Details:
- 100 percent TIG welded
- All Aluminum
- Polished OE style tanks
- (2) 1.25 inch Tubes
- 16 fins per inch
- Corrugated fins that give more surface area and more thermal transfer
- Pressure tested
- For automatic trans
- Direct fitment for 77-87 GM Truck
Radiator Specs
- Core Height 18.8 inch
- Core Width 28.35 inch
- Overall Height 21 inch
- Overall Width 34.33 inch
- Overall Thickness 6 inch
- Upper Hose 1.50 inch
- Lower Hose 1.75 inch
- Tubes (2) 1.25 inch Tubes
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 1977–1980 | Chevrolet | C10 | Custom Deluxe |
| 1977–1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1977–1980 | Chevrolet | K10 | Custom Deluxe |
| 1977–1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1977–1981 | Chevrolet | C10 | Cheyenne |
| 1977–1981 | Chevrolet | K10 | Cheyenne |
| 1977–1982 | GMC | Jimmy | Sierra Grande |
| 1977–1985 | GMC | Jimmy | High Sierra |
| 1977–1986 | Chevrolet | C10 | Silverado |
| 1977–1986 | Chevrolet | K10 | Silverado |
| 1977–1986 | Chevrolet | C10 | Scottsdale |
| 1977–1986 | Chevrolet | K10 | Scottsdale |
| 1977–1987 | GMC | Jimmy | — |
| 1977–1987 | GMC | Jimmy | Sierra Classic |
| 1978 | Chevrolet | K5 Blazer | Silverado |
| 1978–1980 | Chevrolet | C10 | Big Ten |
| 1978–1982 | GMC | Jimmy | Street Coupe |
| 1979–1980 | GMC | C1500 | Heavy Half |
| 1979–1982 | GMC | C1500 | Sierra Grande |
| 1979–1982 | GMC | K1500 | Sierra Grande |
| 1979–1982 | GMC | C1500 | Street Coupe |
| 1979–1986 | GMC | C1500 | — |
| 1979–1986 | GMC | C1500 | Sierra Classic |
| 1979–1986 | GMC | K1500 | Sierra Classic |
| 1979–1986 | GMC | C1500 | High Sierra |
| 1979–1986 | GMC | K1500 | High Sierra |
| 1979–1986 | GMC | K1500 | — |
| 1980–1986 | Chevrolet | K5 Blazer | Silverado |
| 1981 | Chevrolet | K10 | Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1981–1986 | Chevrolet | K10 | Custom |
| 1981–1986 | Chevrolet | K5 Blazer | Custom |
| 1981–1986 | Chevrolet | C10 | Custom |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
