GMC 1995 Safari Owner's Manual page 86

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 parts of the washer system. Also, water
doesn't clean as well as washer fluid.
Fill your washer fluid tank only 3/4 full when it's very cold.
This allows for expansion, which could damage the tank if it is
completely full.
Don't use radiator antifreeze in your windshield washer. It
can damage your washer system and paint.
Rear Window WiperMcasher
-
Dutch Door
You control your rear
window wipedwasher
from a switch on your
instrument panel, on
the driver's side of
your steering column.
Press the top of the switch to the first position to turn on the wiper.
0
Press the top of the switch in all the way and hold to release the desired
amount of washer fluid. The wipers will continue to work after you
release the switch.
0
Press the bottom of the switch (OFF) to turn the wiper off.
The rear window washer system uses the same fluid tank as the windshield
washer system.
The rear window washer system will run out of fluid before the windshield
washer system, indicating you need to check your fluid level and fill the
fluid tank.
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