Cadillac 2012 CTS Owner's Manual page 346

4. After wiper blade replacement,
ensure that the cover hook
slides into the slot in the blade
assembly.
5. Snap the cover down to secure.
To remove the wiper blade:
1. Lift the wiper arm away from the
windshield.
A. Wiper Arm
B. Release Lever
C. Blade Assembly
2. Push the release lever (B) to
disengage the hook and push
the wiper arm (A) out of the
blade assembly (C).
3. Push the new blade assembly
securely on the wiper arm until
the release lever clicks into
place.
4. Replace the wiper cover.
The vehicle has a visual optical
headlamp aiming system. The aim
has been preset at the factory and
should need no further adjustment.
However, if the vehicle is damaged
in a crash, the headlamp aim may
be affected and adjustment may be
necessary.
If oncoming vehicles flash their high
beams at you, this may also mean
the vertical aim needs to be
adjusted.
It is recommended that the vehicle
is taken to your dealer for service if
the headlamps need to be re-aimed.
It is possible, however, to re-aim the
headlamps as described.