Looking to upgrade your cooling system? Check out our PPE 116454025 Coolant Overflow Tank! This tank is specifically designed for Duramax 2001-2007 trucks and can hold up to one gallon of coolant. It's made from hand-cut 6061 aluminum, which has more efficient cooling properties than standard materials. Plus, it utilizes the location of your second battery and plastic water overflow tank for easy installation. Plus, the Stant Lev-R-Vent 16 lb. cap provides added safety and peace of mind. So if you're looking for better cooling performance, make sure to check out our PPE 116454025 Coolant Overflow Tank!