1998 GMC Savana Van Owner's Manual - Page 267

NOTICE: 0 Brakes Brake Fluid 0 0 0 When usingconcentrated washer fluid, follow the manufacturer's instructions for adding water. Don't mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage your washer fluidtank and other partsof the washer system. Also, water doesn't clean as well as washer fluid. Fill your washer fluidtank only three-quarters full when it's very cold. This allows for expansion if freezing occurs, which coulddamage the tank if it is completely full. Don't use engine coolant (antifreeze) in your windshield washer.It can damage your washer systemand paint. Your brake master cylinder reservoir is here. It is filled with DOT-3 brake fluid. 6-27