1998 Cadillac DeVille Owner's Manual - Page 314

Adding Washer Fluid I NOTICE: When using concentrated 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 fluid tank and other partsof the washersystem. Also, water doesn't cleanas well as washer fluid. Fill your washer fluid tank only three-quarters fullwhen it's very cold. This allows for expansion if freezing occurs, which could damage the tank it is if completely full. Don't use engine coolant (antifreeze) in your windshieldwasher. It can damage your washer system and paint. 0 0 0 The windshield washerfluid reservoir is located next to the air cleaner on the driver's side of the engine. Open the cap labeled WASHER FLUID ONLY. Add washer fluid until the tank full. is 0 6-27