Horn
Pressa 
on the steering wheel pad
to sound the horn.
See also:
Tire Rotation and Required Services Every 12 000 km/7,500 mi
Rotate the tires, if recommended for the vehicle, and perform the following services. See Tire Rotation on page 10‑68.
• Check engine oil level and oil life percentage. If needed, change engi ...
Potential Issues
Some OnStar services are disabled after five days. OnStar cannot perform Remote
Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously
for five days. After five days, ...
End a Call
Push . System responds: “Call ended.” ...