Horn
Press 
on the steering wheel
pad to sound the horn.
See also:
Tire Chains
CAUTION:
Do not use tire chains. There is not
enough clearance. Tire chains used on a
vehicle without the proper amount of
clearance can cause damage to the
brakes, suspension, or other vehicle ...
Low-Profile Tires
If the vehicle has P235/45R18 size tires, they are classified as low-profile
tires.
Notice: Low-profile tires are more susceptible to damage from road hazards or
curb impact than standard profile ...
Customer Assistance for Text
Telephone (TTY) Users
To assist customers who are deaf, hard of hearing, or
speech-impaired and who use Text Telephones (TTYs),
Buick has TTY equipment available at its Customer
Assistance Center. Any TTY user can co ...