LS and LT Swap Radiator for 1967-1987 C/K Series Trucks and Blazer/Suburban
Your classic C/K Series Chevy or GMC benefits from targeted cooling support when you drop in an LS or LT powerplant in need of reliable heat control. With its sizable 20.75 inch tall aluminum core, this radiator handles heavy duty tow cycles and steep climbs without requiring frame trimming. Featuring pre installed dual electric fans, the system activates only when coolant temps rise and keeps flow steady in traffic or during open road use. Its inlet and outlet ports mirror the original layout to simplify hose routing and preserve vintage engine bay proportions.
Efficient Aluminum Core for Enhanced Heat Rejection
The 20.75 inch tall radiator core is built from quality aluminum with thick walls that rapidly absorb and shed heat produced by LS or LT engines. This robust construction improves thermal capacity during heavy towing or steep climbs, helping maintain safe coolant temperatures under extended hard use. Aluminum's inherent corrosion resistance ensures the core remains free from rust even in wet or salted environments. The core's depth is optimized for manual transmission installations, providing clearance for the shift linkage and front crossmember without interference. In addition, its lightweight design helps preserve the original front end balance and steering feel, maintaining factory handling characteristics.
On Demand Dual Fan Control for Stop and Go Conditions
Two electric fans are pre installed and engage only when coolant temperature reaches a set threshold or vehicle speed drops low. This intelligent activation prevents unnecessary engine load and limits heat soak when traffic slows or idles. A molded fan shroud channels air evenly across the entire core surface, reducing hot spots and preserving uniform cooling under heavy load. The fans draw minimal current when they activate, ensuring reliable operation without overtaxing the electrical system. The result is steady performance whether the truck is climbing mountain grades or creeping through urban traffic.
Precise Bolt In Fitment to Vintage C K Series Frames
Engineers designed this radiator to slip directly into 1967 to 1987 C K Series Chevy and GMC truck frames with no trimming or adapter brackets required. The inlet and outlet ports mirror the original layout for hose connections that maintain proper routing without kinks or tension. All factory mounting points align perfectly, reducing vibration and ensuring a secure hold under rugged use. External tanks and brackets are reinforced to resist flex during off road excursions or heavy duty work. This precise fitment streamlines installation and lets owners upgrade cooling performance without altering frame or body components.
Protective Finish Options for Long Term Durability
Choose either a bare aluminum finish for a classic engine bay appearance or select the black epoxy coat for an extra barrier against debris and moisture. Both finishes seal the core and end tanks to resist pitting from road grit and salt. The epoxy layer also conceals minor surface marks, simplifying cleanup after off road use or heavy duty service. With no exposed welds left vulnerable, the protective treatment extends the service life of the radiator under demanding conditions. Maintenance is easier thanks to smooth surfaces that shed dirt and grime.
For installations not requiring fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) - HD Cooling which offers the same radiator but without fans.