Horn
Press 
on the steering wheel pad to sound the horn.
See also:
If the Off Indicator is Lit for an Adult-Size Occupant
If a person of adult-size is sitting
in the front outboard passenger
seat, but the off indicator is lit,
it could be because that person
is not sitting properly in the seat.
If this happens ...
Tires
Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer.
See the warranty manual for
information regarding the tire
warranty and where to get
service. For additional ...
Power Mirrors
Premium Trim Shown, Up-Level Similar ...