2021 Chevy Silverado 4500 HD Thermostats & Components
- ACDelco®GM Genuine Parts™ Engine Coolant ThermostatChevy Silverado 4500 HD 2021, GM Genuine Parts™ Engine Coolant Thermostat by ACDelco®. Engine Coolant Thermostat. ACDelco GM Original Equipment Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to...Controls the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperatureGM-recommended replacement part for your GM vehicle's original factory component$39.30