LS and LT Swap Radiator for 1967-1987 C/K Series Trucks Blazer Suburban
When adapting an LS or LT motor into a 1967-1987 SquareBody pickup, the original cooling system often shows its limits under towing or spirited runs. The 1967-1987 GM Truck Radiator 18.5" Tall (Auto Trans) is engineered to fit C/K Series chassis, preserving factory inlet and outlet locations while simplifying installation. Its 18.5 inch aluminum core resists corrosion and promotes rapid heat rejection, so under sustained load or stop and go traffic you maintain stable coolant temperatures. By matching OEM mounting points without modifications, this radiator keeps hose runs tension free and delivers consistent performance in C10, K10, Blazer and Suburban builds.
Precision Fit for C/K Series Chassis Integration
The radiator's exact 18.5 inch core height aligns perfectly with factory mounting points on 1967–1987 C10, C15, K10 and K15 frames as well as Blazer and Suburban bodies. By preserving inlet and outlet positions, this design removes the need to reroute hoses or trim the firewall, ensuring coolant lines remain free of tension and maintain optimal flow. Installers gain a true drop in solution that retains correct radiator angle and hood clearance, critical for uniform coolant circulation under all driving conditions. This attention to fit minimizes alignment issues that can cause premature hose wear or leaks, reducing both installation time and the chance of post-assembly adjustments.
Premium Aluminum Core for Rapid Heat Dissipation
Constructed from high-grade aluminum, the core excels at transferring engine heat into surrounding air with minimal resistance. Aluminum's natural resistance to internal corrosion helps maintain consistent coolant flow and system pressure over years of service. Its light weight also trims front-end mass, improving steering response and efficiency without sacrificing structural strength. An expanded tube-and-fin arrangement increases internal surface area, boosting heat rejection during sustained towing or spirited driving. The combination of thermal performance and durability makes this core ideal for modern LS and LT engine swaps in vintage truck platforms.
Corrosion Defense with Tailored Coating Options
Builders can choose a natural bare aluminum finish to highlight the metal's metallic sheen or select a black epoxy coat for added protection against road salts, oil stains and debris impact. The epoxy layer creates a dense barrier that resists chipping and chemical attack, extending maintenance intervals in harsh environments. Both finishes undergo rigorous adhesion testing to ensure they remain intact through repeated thermal cycles and vibration. This versatility allows restorers and custom builders to balance engine-bay aesthetics with long-term corrosion resistance, keeping the core looking and performing like new season after season.
Engine Cooling Capacity Designed for LS and LT Powerplants
Engineered to meet the higher coolant volume and pressure demands of LS and LT engines, this radiator handles increased flow rates without risk of heat soak during low-speed operation. Robust welded seams and reinforced tank construction resist pressure spikes from high-capacity water pumps, ensuring consistent temperature control under towing load or heavy acceleration. Whether idling at a job site or cruising on the highway, the design maintains a stable operating range to prevent performance-robbing heat spikes. This reliable cooling foundation lets enthusiasts focus on powertrain tuning and drivetrain upgrades with confidence that the radiator will support elevated engine output.
To complete your cooling setup with the same radiator but with fans see our 1967-1987 GM Truck Radiator 18.5" Tall (Automatic Transmission) with Fans. Built for consistent temperature control and precise fit this radiator delivers lasting performance.