18.5in Radiator for LS and LT Swaps in 1967-1987 C/K Trucks, Blazer, Suburban
Swapping an LS or LT motor into a 1967-1987 C/KSeries truck demands precise coolant routing and the 1967-1987 GM Truck Radiator 18.5" Tall (Manual Trans) with Fans meets that need by fitting directly to factory mounts. Equipped with an aluminum core and automatic dual electric fans the assembly delivers steady airflow at low speeds or under towing load to prevent heat soak. Technicians will find that hose and transmission cooler lines align perfectly on C10, C15, K10, K15, Blazer, and Suburban frames eliminating time consuming modifications.
Precision Fitment for 1967 to 1987 C/K Series Trucks
This 18.5 inch tall radiator was engineered to bolt directly into the factory mounting points on C10, C15, K10, K15, Blazer and Suburban models without altering original hose paths or transmission cooler lines. By matching the stock core height and bracket spacing, coolant hoses and cooler fittings align perfectly, eliminating the need for custom adapters or trimming. Installers benefit from a straightforward, drop in solution that preserves the factory look and minimizes the risk of leaks or kinks in the coolant circuit.
Automatic Dual Fan Cooling System
Featuring two high-capacity electric fans that activate in response to rising coolant temperatures, this assembly maintains airflow even at low vehicle speeds or under towing load. The dual fan arrangement ensures uniform air distribution across the entire core surface, preventing hot spots and heat soak during stop-and-go traffic or heavy hauling. Integrated control wiring comes pre-configured, removing the need for aftermarket relays or temperature switches and reducing potential points of failure.
Aluminum Core Heat Dissipation and Coating Choices
Constructed from high quality aluminum, the radiator core offers superior thermal conductivity compared to traditional copper brass units, enabling rapid heat transfer away from the engine. Its optimized tube and fin layout increases coolant volume and maximizes rejection of heat during sustained highway cruising or extended idling. Aluminum's natural resistance to corrosion extends service intervals, and buyers may select either the bare metal finish for lightweight performance or a black epoxy coat for enhanced surface protection and visual appeal.
Domestic Manufacturing and Quality Assurance
Produced entirely in the United States, each radiator core, fan shroud and mounting bracket undergoes comprehensive in-house inspections to ensure consistent dimensions and flawless operation. This local manufacturing strategy not only supports skilled craftsmanship but also shortens lead times for replacements or warranty claims. With every unit meeting tight tolerance standards before it ships, installers and end users alike can trust in reliable performance without post-purchase surprises.
Count on consistent engine cooling under towing or urban driving; for the same radiator but without fans see our 1967-1987 GM Truck Radiator 18.5" Tall (Manual Transmission) Without Fans.