Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
Steps for Determining Correct Load Limit
1. Locate the statement “The
combined weight of
occupants and cargo should
never exceed XXX kg or
XXX lbs” on your vehicle's
placard.
2. Determine the combined
weight of the driver an ...
Horn
Press near or on the horn symbols on your
steering wheel pad to sound the horn. ...
Audio Source
VOL/ (Volume/Power):
1. Press to turn the radio on or off.
2. Turn to increase or decrease the
volume of the active source
(i.e., current audio source, active
navigation voice guidance,
or ...