Radiator for LS and LT Swaps in 1967-1987 C/K SquareBody Trucks
Installing a modern LS or LT powerplant into a 1967-1987 C/K Series pickup often exposes the cooling capacity limits of the stock radiator under heavy load. The 1967-1987 GM Truck Radiator 18.5" Tall (Auto Trans) tackles this with an exact drop in fit that preserves OEM mounting points and inlet positions. An 18.5 inch aluminum core offers corrosion resistance and rapid heat rejection while reducing front end mass for stable engine temperatures during towing or highway driving. Compatible with C10, C15, K10, K15, Blazer and Suburban chassis this radiator pairs LS and LT compatibility with factory inlet and outlet locations for quick installation and reliable everyday cooling.
Exact 18.5 Inch Core Height for Seamless C/K Series Alignment
This radiator's 18.5 inch core height is engineered to match the original mounting points on 1967-1987 C10, C15, K10 and K15 chassis, as well as Blazer and Suburban frames. By preserving factory inlet and outlet locations, it eliminates the need to reroute hoses or trim the firewall, ensuring coolant flow remains unimpeded and free of tension. Builders benefit from a truly drop in design that maintains correct radiator angle and hood clearance, critical for consistent coolant circulation under varying load conditions. This precise fit also reduces installation time and avoids common alignment issues that can lead to early hose wear or coolant leaks.
High-Quality Aluminum Core for Efficient Heat Dissipation
Constructed entirely from premium aluminum, the core offers exceptional thermal conductivity that shuttles engine heat into passing air with minimal resistance. Aluminum's inherent corrosion resistance helps prevent internal oxidation over time, maintaining maximum coolant flow and system pressure. At the same time, its light weight trims front end mass, improving steering feedback and fuel economy without sacrificing strength. The expanded tube-and-fin design boosts surface area within the same footprint, delivering rapid heat rejection during sustained towing, spirited driving or stop-and-go traffic.
Coating Options Maximizing Durability and Appearance
Choose a classic bare aluminum finish to showcase a natural metallic sheen or opt for the black epoxy coating for enhanced protection against road salts, oil spills and abrasive debris. The epoxy layer forms a dense barrier that resists chipping and holds up to chemical exposure, extending service intervals in harsh environments. Both finishes are applied to meet stringent adhesion standards, ensuring they remain intact under repeated thermal cycling. This flexibility lets builders maintain a clean engine bay presentation while safeguarding the radiator against corrosion and mechanical wear.
Engineered Capacity for LS and LT Cooling Demands
Tailored specifically for modern LS and LT powerplants, this radiator handles higher coolant volumes and elevated pump pressures without risk of heat soak at low speeds. Its robust welded seams and tank construction withstand pressure spikes, delivering reliable temperature control during towing or heavy acceleration. Whether under sustained highway loads or idling at a job site, the design preserves a stable operating range, preventing performance-robbing temperature spikes. This focus on consistent heat management lets enthusiasts concentrate on powertrain tuning and drivetrain upgrades, confident their cooling system will support advanced engine output.
Enjoy consistent temperature control with this radiator upgrade. For the same radiator but with fans see our 1967-1987 GM Truck Radiator 18.5" Tall (Automatic Transmission) with Fans.