Heavy-Duty Radiator for LS and LT Swaps in 1967-1987 C/K Series Trucks
Swapping an LS or LT powerplant into a 1967 through 1987 C/K Series truck with manual transmission often pushes the stock cooling system beyond its limits and this robust radiator maintains stable engine temperatures under heavy towing or slow speed climbs. Its 20.75 inch tall core boosts coolant capacity and dense tube and fin construction delivers consistent heat rejection during steep grades high load conditions and hot weather. Precision formed mounting tabs and factory aligned hose outlets fit 1967 to 1987 C10 C15 K10 and K15 frames as well as Blazer and Suburban chassis without custom fabrication.
Precision Fitment for 1967 to 1987 C K Frames
The radiator's mounting tabs and hose outlets are stamped to match original hole patterns on 1967 to 1987 C10, C15, K10 and K15 frames as well as Blazer and Suburban chassis. This exact match eliminates the need for custom brackets or trimming, preserving correct angles for hose routing and manual transmission linkages. Accurate placement also maintains proper offset from the firewall, ensuring clearance for service access and linkage movement. Tight tolerances are achieved through precision forming tools at the factory, removing guesswork during installation. Installers save time and avoid leaks or alignment issues common with generic parts.
20.75 Inch Core Capacity for Improved Heat Rejection
By expanding the core height to 20.75 inches, this radiator holds extra coolant to buffer rapid temperature spikes produced by modern LS and LT engines. A dense tube and fin construction increases surface area so moving air extracts heat evenly across the entire core face. This arrangement remains efficient when the truck crawls uphill or tows heavy loads at low speed under direct sun. The additional coolant volume also slows temperature rise over long trips in high ambient conditions. Drivers notice more consistent gauge readings and fewer overheating warnings on demanding drives.
Lightweight Aluminum Construction for Enhanced Dynamics
Constructed entirely from high quality aluminum, this assembly cuts front end weight significantly compared to traditional copper brass units. Aluminum's natural conductivity accelerates heat transfer from coolant into the fins and then to the oncoming air stream. Its inherent resistance to moisture and road salt helps prevent pitting and corrosion in coastal or winter climates. The reduced mass at the front axle translates into crisper steering response and lower spring load. Together, these factors extend suspension life and preserve chassis tuning after an LS or LT swap.
Protective Finish Options to Combat Corrosion
Builders may choose a bare aluminum finish that develops an authentic mechanical patina over time or select a black epoxy coating for extra defense against moisture and debris. The epoxy layer is applied under strict domestic quality controls to guard against peeling and chipping in harsh service conditions. Each variant undergoes inspection for uniform coverage before leaving the factory, ensuring reliable adhesion and appearance. This choice lets enthusiasts balance visual style with environmental protection based on local weather and driving conditions. Either finish maintains coolant flow and radiator efficiency while adding a custom touch to the engine bay.
Count on reliable cooling under heavy load. To get the same radiator but with fans, see our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) with Fans - HD Cooling.