LS and LT Radiator for 1967-1987 C/K Series Trucks and Blazer/Suburban
When fitting an LS or LT powerplant into a 1967 to 1987 C/K Series truck or Blazer/Suburban, cooling demands quickly exceed the stock radiator under towing or stop and go traffic. Our 18.5 inch tall radiator with integrated transmission cooler delivers a direct drop in fit that aligns with original brackets, inlet and outlet locations, and hood clearance without custom mounts or line bending. Built from high conductivity aluminum and paired with dual electric fans that activate on temperature threshold, it sustains coolant flow and reliable heat rejection during everyday driving and heavy towing. Precise alignment on Chevy and GMC C10, C15, K10, K15 trucks plus Suburban and Blazer frames preserves belt path, simplifies wiring, and cuts installation time for garage and shop builds.
Direct Fit for 1967 to 1987 C K Series Frames
This radiator is engineered to drop directly into 1967 to 1987 Chevy and GMC C K Series trucks by matching the factory bracket locations and fluid passages. The inlet, outlet and transmission cooler ports align with original points so there is no need to modify hoses or supports when upgrading the cooling system. Hood clearance remains unchanged and the accessory belt path follows its intended route to avoid rerouting beneath the hood. This precision fit removes guesswork during installation and reduces the chance of leaks by preserving straight coolant lines that mirror vehicle contours. Service procedures such as draining and refilling are carried out at the same access points as stock assemblies, making routine maintenance intuitive for professional mechanics and weekend builders alike. By eliminating the need for custom fabrication, this design translates to fewer installation hurdles and more predictable results on both street and work truck applications.
Efficient Cooling with Dual Electric Fans
The pair of electric fans deliver cooling airflow only when the engine temperature rises above a preset threshold, helping maintain an ideal thermal window during idle or heavy towing conditions. Because the fans operate independently of engine speed, coolant flow remains consistent in stop and go traffic without additional mechanical load on the crankshaft pulley. This targeted activation reduces overall fan run time and lowers electrical demand during cruising, which in turn extends the life of wiring components. Installation taps into the existing fan wiring harness for a clean integration that preserves original switchgear functionality. The fan control module responds rapidly to changes from the coolant temperature sensor, ensuring immediate airflow when conditions demand rapid heat rejection. In practice this setup delivers stable engine temps during mountain grades or sustained low speed operation.
High Conductivity Aluminum Core with Tube and Fin Geometry
At its heart the radiator features an 18.5 inch aluminum core with tube and fin architecture that maximizes coolant volume and surface area for efficient heat exchange. Aluminum's natural conductivity accelerates the transfer of heat from coolant to air, which is critical when towing a trailer or idling at a job site. Internal parallel channels guide fluid evenly to resist hotspots and maintain stable temperatures under continuous heavy load. US made side tanks join the core via precision welding to ensure consistent flow rates and resist pressure fluctuations during extended heat cycles. The reduced mass compared with a cast unit eases stress on front suspension components and helps maintain balanced chassis dynamics. Combined with high flow coolant circulation this core design delivers reliable temperature control in everyday travel and demanding duty cycles.
Count on reliable cooling performance with this direct fit design; for the same radiator but without fans see our 1967-1987 GM Truck Radiator 18.5" Tall (Automatic Transmission) Without Fans.