Horn
Press 
on the steering wheel
pad to sound the horn.
See also:
Radio Reception
Frequency interference and static can occur during normal radio reception if
items such as cell phone chargers, vehicle convenience accessories, and external
electronic devices are plugged into th ...
Check Engine Light
A computer system called OBD II (On-Board
Diagnostics-Second Generation) monitors operation
of the fuel, ignition, and emission control systems.
It ensures that emissions are at acceptable levels ...
Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block,
and Roadside Assistance, if the vehicle is equipped with these services. OnStar
can unlock the vehicle doors remotel ...