LS and LT Radiator with Auto Trans Fans for 1963-1966 C/K-Series Chevy and GMC Trucks
If you are fitting an LS or LT engine into a 1963 to 1966 C10, C15, K10 or K15 pickup, the 1963-1966 GM Truck Radiator (Auto Trans) with Fans is designed to maintain stable engine and transmission temperatures during city driving, heavy towing and highway cruising. Each aluminum radiator bolts directly to factory C and K frame mounts and features a built in transmission cooler port that aligns with standard automatic plumbing for tidy hose routing and straightforward installation. Its TIG welded core and side tanks resist leaks and corrosion, ensuring consistent coolant flow even when airflow alone cannot manage rising heat. Supplemental airflow is provided by dual fans that switch on under load to keep temperatures in check. All units are made in the USA with quality and flow capacity that meet the demands of modern V8 powerplants.
Precision TIG Welding for Aluminum Core Integrity
The radiator's core and side tanks are joined using TIG welding to create seamless aluminum bonds that resist leaks under constant temperature cycling. This welding process preserves the intrinsic thermal conductivity of the high‐quality aluminum material, ensuring rapid heat transfer from coolant to airflow. Unlike other fusion methods that introduce filler materials or weaken metal grains, TIG welding produces smooth bead lines that maintain uniform coolant passages and eliminate hotspots. The result is a radiator that sustains stable engine temperatures during heavy towing, freeway speeds, and stop and go conditions without compromising structural strength or durability.
Dual Electric Fans for Responsive Thermal Management
Integrated dual fans are mounted directly to the radiator face to deliver even airflow across the full core surface when vehicle speed alone cannot provide sufficient cooling. Each fan operates independently, covering half the radiator to prevent localized heat buildup and ensure balanced temperature control under load. These fans engage automatically as coolant temperatures rise, responding instantly to towing demands or low-speed cruising. By maintaining consistent airflow in challenging conditions, this design keeps both engine and transmission fluids within optimal ranges, reducing the risk of overheating during extended drives or steep grades.
Bare Aluminum and Epoxy Finishes for Lasting Protection
Owners can choose between a natural bare aluminum appearance or a durable black epoxy coating based on their style and maintenance preferences. The bare finish develops an authentic patina over time that suits classic restorations, while the epoxy option provides a protective barrier against moisture, road salt, and chemical exposure in modern custom builds. Critical areas such as mounting pads and cooler ports receive precise masking to prevent coating overspray, preserving alignment accuracy and sealing integrity. This attention to finish detail not only enhances corrosion resistance but also ensures a showroom‐quality look that lasts.
To select the same radiator but without fans, explore our 1963-1966 GM Truck Radiator Automatic Transmission for matching core quality and cooling reliability.