Description: All models. 7.4l. 5.7-8. 4 cylinder. 5.0l. Mpi. Astro, Safari. Controls the flow of coolant through the radiator to help your vehicle's engine reach and maintain its optimal operating temperature Professional, premium aftermarket replacement This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Manufactured to meet expectations for fit, form, and function