1967-1987 C/K Series Trucks Radiator for LS and LT Engine Swaps
For builders fitting an LS or LT into a 1967 to 1987 C slash K Series truck or Blazer chassis and running an automatic transmission, stock cooling often cannot keep pace with modern output. This 1967 to 1987 GM Truck Radiator 20.75 inch tall model solves that by offering a taller core and over 25 percent more coolant volume to maintain stable temperatures during steep grades and slow speed towing. Crafted from corrosion resistant aluminum with optimized fin spacing, it channels airflow evenly to avoid thermal hotspots. Designed to match original mounting points it installs without custom brackets, keeping fitment straightforward.
Uniform Airflow from the 20.75 Inch Tall Core
The 20.75 inch tall core enhances cooling by channeling incoming air evenly across its full height. Precisely spaced fins guide airflow to every coolant passage, eliminating localized hotspots that can stress head gaskets and engine bearings under heavy loads. This uniform heat exchange is critical when climbing steep grades or crawling at low speeds with a trailer in tow, as it prevents rapid temperature spikes. Engine builders benefit from a design that aligns with factory mounting points on 1967 through 1987 C/K trucks, Blazers, and Suburbans, delivering a no-fuss fit that avoids custom brackets or modifications.
Premium Quality Aluminum for Fast Heat Rejection and Reduced Weight
Constructed entirely from premium quality aluminum, this radiator takes advantage of the metal's exceptional thermal conductivity and natural corrosion barrier. Heat moves swiftly through the thin walls and fins, allowing the engine to maintain optimal operating temperatures during extended highway journeys or in extreme summer conditions. At the same time, its light weight places less strain on suspension components and mounting hardware, helping to preserve steering feel and chassis balance. Each unit is crafted in the USA to meet tight tolerances for automatic transmission applications, ensuring consistent performance and fit.
Expanded Coolant Capacity for Steady Temperatures under Load
By increasing coolant volume by more than 25 percent over original equipment, this radiator adds a vital thermal buffer that smooths out rapid temperature swings. The added fluid mass acts as a heat sink during slow traffic or mountain passes, reducing the frequency of heat cycles that accelerate coolant breakdown. Stable coolant temperatures also translate to longer maintenance intervals, since lower operating heat slows chemical degradation and helps maintain system integrity. This makes the radiator especially valuable for trucks and Blazers tackling demanding daily tasks or weekend adventures.
Bare Aluminum or Black Epoxy Finish for Protection and Style
Choose the uncoated aluminum option to maximize raw heat rejection or select the durable black epoxy coating to guard against moisture and road debris. Both finishes are applied in thin layers that do not impede airflow through the fins, so performance remains fully intact. The epoxy variant excels in humid or salty environments by providing an extra barrier against corrosion, while the bare surface presents a classic look that complements both restored and modernized engine bays. Maintenance is straightforward, with simple cleaning preserving appearance and performance alike.
Precision engineered for reliable cooling in your LS or LT swap. For the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Automatic Transmission) with Fans - HD Cooling.