Changing the front and rear brakes on vans requires addition of fluid to the brake master cylinder because it will be replaced when you bleed them. Brake noise is caused by worn brake pads, most newer chevy and gmc vans have disc brakes instead of drum brakes. Brake hoses are easy to replace with stainless steel brake lines for the hydraulic fluid. Squeaking brakes means you used a low budget aftermarket pad that wears unevenly or your caliper piston need replaced. Upgrade your brakes at a repair shop or do it yourself with some of our how-to articles.