1967-1987 C/K Series Chevy & GMC Truck/Blazer/Suburban Radiator for LS and LT Engines
The 1967 to 1987 GM Truck Radiator 20.75 inch Tall Auto Trans HD Cooling unit is engineered to maintain stable coolant temperatures while fitting classic C/K Series mounts. Crafted entirely from aluminum, it increases coolant volume beyond stock levels and accelerates heat rejection during sustained climbs or heavy towing. It installs directly into 1967 to 1987 C10, K10, Blazer and Suburban trucks with automatic transmissions using factory mounting points and requires no trimming or modification. Its precise fin geometry promotes even heat exchange across each coolant pass to safeguard critical engine components on long hauls.
Precision Core Height and Fin Geometry for Optimal Heat Rejection
The 20.75 inch tall radiator core delivers a substantial increase in coolant volume compared to factory units. Precision-spaced fins maximize contact between coolant and airflow, enabling consistent heat removal during extended climbs or slow-speed towing. By maintaining uniform temperature across every coolant channel, this geometry helps protect engine components from thermal stress. The even distribution of heat exchange also reduces the risk of hot spots that can lead to gasket failures or bearing wear.
All-Aluminum Construction for Rapid Thermal Transfer and Corrosion Resistance
Crafted exclusively from high quality aluminum, the radiator offers superior thermal conductivity over traditional materials, drawing heat away from the engine block more quickly. The natural oxide layer that forms on the aluminum surface provides a built-in barrier against corrosion, ensuring reliable performance in demanding conditions. This lightweight assembly reduces front-end mass, improving overall vehicle balance without sacrificing strength or durability. Consistent temperature control and resistance to warping make this radiator ideal for extended service intervals.
Expanded Coolant Capacity for Heavy Towing and Extreme Heat Conditions
With an increased core height, this radiator boosts coolant volume well beyond stock levels, making it easier for LS and LT engines to shed heat under load. Whether climbing steep grades or tackling slow-speed crawls, the larger capacity buffers against sudden temperature spikes during summer months. This enhanced reservoir of coolant helps sustain stable engine operation over long distances and under high stress, safeguarding vital components like head gaskets and bearings from premature wear.
Protective Bare and Epoxy Coatings for Enhanced Durability
Choose a classic bare aluminum finish for maximum heat transfer or select the black epoxy coating to guard against road debris, moisture and corrosion. Each finish is uniformly applied in house to ensure even cooling performance without hotspots. Beyond improved protection, these options simplify routine cleaning and maintain a polished engine bay appearance in both vintage and modern builds.
Enjoy stable cooling in all conditions. For the same radiator but with fans, see our 1967-1987 GM Truck Radiator 20.75" Tall (Automatic Transmission) with Fans - HD Cooling.