LS and LT Radiator for 1967-1987 C/K Series Trucks and Blazer/Suburban
Swapping an LS or LT powerplant into a classic C/K Series pickup or Blazer/Suburban means pairing that engine with a cooling system that drops into stock rails without trimming or extra brackets. This manual transmission radiator features a 20.75 inch tall aluminum core with thick walls and preinstalled dual electric fans that engage on demand to maintain stable coolant flow under towing loads or during slow speed travel. Inlet and outlet ports match original locations for factory hose routing while reinforced tanks and support brackets resist flex under vibration. Aluminum's natural corrosion resistance helps keep the core free of rust in wet or salted environments maintaining reliable operation on long hauls.
Thick Wall Tube and Fin Core for Extreme Heat Rejection
Our radiator uses a deep 20.75 inch tall core with thick wall tubes and tightly packed fins made entirely of aluminum. This arrangement gives a large surface area for heat exchange so coolant releases energy rapidly into the airstream, even under sustained load. The robust walls of each tube resist flex and cracking when exposed to vibration and frame twist during off road or towing use. Reinforced side plates and tank supports add rigidity to the assembly, ensuring it holds shape after exposure to heat cycles. The combination of tube wall thickness and precise fin spacing achieves an ideal balance of structural strength and thermal performance for LS and LT powerplants.
Precision Fan Shroud Maximizes Airflow Efficiency
The included dual electric fans are housed in a molded shroud that directs air evenly across the entire core area, eliminating hotspots. This design also minimizes turbulence and maintains smooth airflow through the fin matrix. Fans remain off until coolant temperature exceeds the preset threshold or vehicle speed drops, preventing unnecessary power draw at highway speeds. When engaged, they run quietly while delivering consistent volume at low road speed or idle. This efficient fan assembly integrates seamlessly with the existing electrical system via the stock wiring harness and thermal switch for hassle free operation.
Made in the USA Craftsmanship for Lasting Reliability
Every radiator is assembled and tested in the United States to ensure consistent build quality and fit accuracy. Skilled technicians inspect each weld and pressure test the core to verify leak free performance under demanding conditions. Local assembly also means fast access to replacement parts and service support without long shipping delays. This attention to detail extends the life of the cooling system and helps maintain peak operation on long trips or daily workloads. Buyers benefit from confident purchase backed by domestic manufacturing standards.
Manual Transmission Integration without Frame Modifications
This radiator matches the factory inlet and outlet positions for manual transmission applications, allowing hoses to follow stock routing without kinking or stretching. Its core height and depth clear the shift linkage, transmission mount, and cross member, so there is no need to move or trim frame components or linkages. All mounting ears align precisely with the original brackets on C/K Series frames, locking the radiator firmly in place to resist vibration and off road shocks. Technicians appreciate the true bolt in upgrade that saves time in the garage and preserves the truck’s original under hood appearance and service access.
For the same radiator but without fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) - HD Cooling which delivers the same precision fit and robust aluminum construction.