ACDelco 21978 Auxiliary Radiator Assembly

The ACDelco 21978 is a GM Original Equipment auxiliary radiator assembly designed to provide supplemental cooling capacity for 2020-2025 Chevrolet Silverado 2500 HD trucks equipped with the 6.6L V8 L5P diesel engine. This auxiliary radiator works in conjunction with the primary radiator to enhance overall cooling system performance, particularly beneficial for heavy-duty towing and hauling applications.

Key Features:

• GM Original Equipment part ensuring exact fit and OEM performance specifications
• Aluminum and plastic construction for optimal heat transfer while reducing weight
• Corrosion-resistant design for long-lasting durability
• Engineered and validated by General Motors to meet rigorous quality standards
• Direct replacement for factory auxiliary radiator component

ACDelco GM Original Equipment radiators are manufactured to the same specifications as the components installed during vehicle production, providing dependable cooling performance and the service life you expect from genuine GM parts. This auxiliary radiator is specifically designed to handle the demanding cooling requirements of modern diesel engines under heavy load conditions.