See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Power Reclining Seatbacks
To adjust a power seatback, if equipped: • Tilt the top of the control rearward to recline. • Tilt the top of the control forward to raise. ...

Horn
Press on the steering wheel pad to sound the horn. ...