This genuine OEM heat and AC controller is designed for use in your 2003 Chevrolet Express 2500 van. It provides reliable performance and accurate temperature control to keep you comfortable on the road, no matter the weather outside. With easy installation and compatibility with a range of HVAC controls and units, this is the perfect solution for anyone looking to upgrade their vehicle's interior. Don't miss out on the chance to improve your driving experience with this high-quality part.