Cadillac 2012 CTS Owner's Manual page 345

4. Lift up the wiper blade
assembly cap.
5. Pull the wiper blade assembly
down far enough to release it
from the J-hooked end of the
wiper arm. Slide the assembly
away from the arm.
Allowing the wiper blade arm to
touch the windshield when no
wiper blade is installed could
damage the windshield. Any
damage that occurs would not
be covered by your warranty. Do
not allow the wiper blade arm to
touch the windshield.
6. Replace the blade with a
new one.
7. Reinstall the wiper blade
assembly by sliding it over
the wiper arm to engage the
J-hooked end. Pull up on the
assembly to lock it into place.
8. Repeat the steps for the other
wiper.
The rear wiper blade and wiper arm
have a cover for protection. The
cover must be removed before the
wiper blade can be replaced.
To remove the cover:
1. Slide a plastic tool under the
cover and push upward to
unsnap.
2. Slide the cover toward the wiper
blade tip to unhook it from the
blade assembly.
3. Remove the cover.