Maintain the braking system in your 1982-2000 Chevy/GMC 6.2L/6.5L Diesel by replacing the brake fluid on a regular basis. 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. Brake fluid is one of the most frequently ignored fluids when it comes to basic maintenance, despite the fact that brakes are one of the most important safety aspects of a vehicle. Brake fluids are available in DOT 3, DOT 4, DOT 5, and DOT 5.1. DOT 3 and DOT 4 are the most commonly used brake fluids. DOT 3 is compatible with DOT 4 brake fluid however DOT 4 offers a higher boiling point. Brake fluid will eventually start to accumulate moisture despite being a closed system. As a result of the water's lowered boiling point, the braking efficiency will start to deteriorate. XDP offers brake fluid from all the leading manufacturers including Lucas Oil, and more!