Buick LaCrosse Owner's Manual page 284

The fluid level should be between
MIN and MAX on the dipstick.
To determine what kind of fluid to
use, see
use the proper fluid.
When windshield washer fluid is
needed, be sure to read the
manufacturer's instructions before
use. If operating the vehicle in an
area where the temperature may fall
below freezing, use a fluid that has
sufficient protection against
freezing.
. Always
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See
for reservoir location.