Radiator for LS and LT Engines in 1967-1987 C/K SquareBody Trucks
Maintaining stable engine temps in an LS or LT swap into a 1967-1987 C/K Series truck demands a radiator that can keep pace with modern power outputs, and the 1967-1987 GM Truck Radiator 20.75" Tall (Auto Trans) - HD Cooling addresses this need. This aluminum core design expands coolant volume and features precision rows to shed heat during steep climbs and towing runs, cutting down thermal stress on critical components. Featuring LS and LT compatibility, this radiator installs easily on C10, C15, K10 and K15 models as well as Blazers and Suburbans with automatic setups to ensure steady flow and temperature control.
Optimized Cooling Capacity for LS and LT Engines
The 20.75 inch tall core expands coolant volume well beyond factory levels, allowing your swapped LS or LT engine to shed heat more efficiently under severe conditions. Precision rows in the fin pack increase surface area and channel coolant through the tubes on each pass, maintaining stable temperatures during slow crawls, steep grades, and extreme summer heat. By preventing thermal spikes, this radiator reduces stress on head gaskets and bearings, helping engines run cooler and more reliably over long towing or off-road sessions.
Lightweight Aluminum Construction with Superior Durability
Constructed entirely from high quality aluminum, both the core and side tanks deliver the ideal balance of strength and low weight to ease front-end load on your C/K Series chassis. Aluminum's inherent thermal conductivity moves heat away from critical engine areas faster than traditional copper and brass designs, while its natural corrosion resistance wards off pitting and blockage. The rugged build resists warping across repeated temperature cycles, ensuring consistent coolant flow and extended service intervals.
Versatile Finish Options for Protection and Style
Choose between a classic bare aluminum look that highlights the core structure or a durable black epoxy coating that adds a protective barrier against road debris and moisture. Both finishes are applied in-house with uniform coverage to prevent hotspots and preserve peak cooling efficiency. Beyond corrosion resistance, these options simplify routine cleaning and help maintain an engine bay appearance that complements both vintage and modern builds.
Engineered for consistent cooling and durable service in your LS or LT swap. For the same radiator but with fans, see our 1967-1987 GM Truck Radiator 20.75" Tall (Automatic Transmission) with Fans - HD Cooling.