Cadillac 2009 STS-V - Manual (Page 379)

STS-V models will automatically move the windshield
wipers to the park position if the hood is open.
Make sure the hood is closed before replacing your
windshield wiper blades.
To replace the wiper blade assembly, do the following:
1. Pull the windshield wiper assembly away from
the windshield.
2. Squeeze the tabs on each side of the wiper blade
assembly and slide the assembly off the end of the
wiper arm.
3. Replace the blade assembly with a new one.
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.
4. Repeat the steps for the other wiper.
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