What Radiator and Fans Work Best for an LS-Swapped Chevy C10?
Overheating in traffic isn’t “normal.” It’s usually airflow and control strategy.
Short answer: the best cooling setup for an LS-swapped C10 is a properly sized radiator paired with electric fans that pull air through the core (with a shroud) and a fan control strategy that matches your driving conditions. Most overheating problems come from airflow and fan control — not a “bad radiator.”
“Cooling is airflow management. If the air doesn’t move, the temperature will.”
What Actually Causes LS Swap Overheating
- Fans mounted without a shroud (air takes the easy path around the core)
- Fan control not engaging early enough (or not engaging at all)
- Air pockets and poor bleeding
- Exhaust heat soaking the engine bay
- Radiator too small for the use case
A Builder-First Cooling Priority List
- Shrouding: non-negotiable for idle/traffic cooling
- Fan control: ECU/thermostat strategy that turns fans on before heat soak wins
- Airflow path: seal the radiator area so air goes through the core
- Heat management: keep fuel lines and wiring away from exhaust
Shop: Fuel & Cooling | Electrical & Wiring
Keep It Cool, Keep It Consistent
Cooling is one of the fastest ways to turn a swap into a true driver. Start with:
