1995 GMC Safari Owner's Manual - Page 234

Windshield Washer Fluid To Add Open the cap labeled WASHER FLUID ONLY. Add washer fluid until the tank is full. NOTICE: When using concentrated washer fluid, followthe 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 fluid of tank and other parts the washer system. Also,water doesn't cleanas well as washer fluid. Fill your washer fluidtank only 3/4 full when it's very cold. This allows for expansion, which could damage tank if it is the completely full. 0 Don't use radiator antifreeze in your windshield washer.It can damage your washer systemand paint. 6-28