Global Machinery Company Sierra 1999 - Manual (Page 331)

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Windshield Washer Fluid
What to Use
When you need windshield washer fluid, be sure to read
the manufacturer’s instructions before use. If you will be
operating your vehicle in an area where the temperature
may fall below freezing, use a fluid that has sufficient
protection against freezing.
Adding Washer Fluid
Open the cap labeled WASHER FLUID. Add washer
fluid until the tank is full.
NOTICE:
D When using concentrated washer fluid,
follow the manufacturer’s instructions for
adding water.
D 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 parts of the washer system. Also,
water doesn’t clean as well as washer fluid.
D Fill your washer fluid tank only
three - quarters full when it’s very cold. This
allows for expansion if freezing occurs,
which could damage the tank if it is
completely full.
D Don’t use engine coolant (antifreeze) in
your windshield washer. It can damage
your washer system and paint.