Replace the old, contaminated brake fluid in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax to help maintain the brake system. Over time brake fluid will begin absorb moisture in the air. This water contamination can cause your brakes to start losing effectiveness since water decreases the brake fluid's boiling point. Although brake fluid is sometimes one of the most overlooked fluids, brakes are one of the most crucial safety features of a vehicle. Many manufacturers recommend replacing the brake fluid every 2-3 years or at specific mileage intervals. It is very important to follow the manufacturer's recommended service schedule as well as testing your brake fluid occasionally. DOT 3, DOT 4, DOT 5, and DOT 5.1 are just a few of the brake fluids that are readily available. The DOT 3 and DOT 4 brake fluids are the most commonly used. DOT 4 brake fluid has a greater boiling point than DOT 3, despite the fact that the two are interchangeable. XDP offers brake fluids from the top brands such as Lucas Oil, and more!