1967-1987 GM C/K Trucks Blazer and Suburban Radiator for LS and LT Swaps
For builders installing an LS or LT powerplant into a 1967 to 1987 Chevrolet or GMC C10, C15, K10 and K15 truck chassis or Blazer and Suburban models with an automatic transmission, the 1967-1987 GM Truck Radiator 20.75" Tall (Auto Trans) - HD Cooling provides a heavy duty solution that fits using factory mounts. Crafted in the USA, this full aluminum core that stands 20.75 inches tall increases coolant capacity and channels air across its entire surface for stable engine temperatures under load. With no fan included this heavy duty cooling design accepts a variety of electric or mechanical fans and is available in bare aluminum or black epoxy finish to suit environments prone to moisture and road debris. Simple factory fitment and domestic origin ensure reliable performance and straightforward installation.
Application and Fitment
The 1967 through 1987 GM truck radiator with a 20.75 inch tall core is engineered for automatic transmission models. It supports popular LS and LT engine swaps in this chassis range. Core height and width have been calibrated to match factory support points and ensure smooth installation without clearance issues under the hood. This radiator design leverages precise measurements to align with MuscleRods mounts so you can maintain correct engine placement and proper drivetrain angles. That integration also preserves belt and accessory clearance for a plug and play fit in classic GM chassis.
Construction and Performance
As part of the HD Cooling family this 20.75 inch tall radiator is crafted from high-quality aluminum to promote rapid heat transfer and resist corrosion. The precise tube and fin layout is designed to maximize contact area and airflow through the core while maintaining low restriction. Tanks feature reinforced walls and welded seams for strength under high pressure, and the polished finish allows quick spot checks for stress cracks. By boosting cooling capacity compared to OE units, it controls coolant temperatures in heavy traffic, towing, or spirited driving scenarios and extends the life of engine seals and gaskets.
Integration Benefits
Manufactured entirely in the USA, this radiator meets stringent quality controls to deliver consistent performance from build to build. By partnering with MuscleRods mounts the radiator system ensures correct alignment with the engine block and cross member. This means the radiator core sits squarely in the airflow path and hoses maintain optimal angles. Installation time is reduced and risk of leaks or rubbing is minimized. The durable aluminum construction and proven fitment strategy make this radiator the best upgrade for any 1967 to 1987 GM truck project using LS or LT power.
For the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Automatic Transmission) with Fans - HD Cooling.