Cadillac CTS Owner's Manual page 323

2. Wipe the cap and the top of the
reservoir clean.
3. Unscrew the cap and wipe the
dipstick with a clean rag.
4. Replace the cap and completely
tighten it.
5. Remove the cap again and look
at the fluid level on the dipstick.
The level should be between the
HOT and COLD marks. If necessary,
add only enough fluid to bring the
level between the marks.
To determine what kind of fluid to
use, see
use the proper fluid.
When adding windshield washer
fluid to the vehicle, 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.
The WASHER FLUID LOW ADD
FLUID message will appear on the
Driver Information Center (DIC)
when the fluid level is low. See
. Always
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See
.
for reservoir location.