GMC 2001 Envoy - Manual (Page 146)

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The light will be red in the event of an OnStar system
malfunction. If this occurs press the OnStar button to
attempt to contact an advisor. If the connection is made,
the advisor will assist you with steps to take to make
sure that the system is functioning properly. If you
cannot contact the advisor, take your vehicle to your
dealership as soon as possible for assistance.
Safety and Security Services
D Automatic Notification of Air Bag
Deployment -- If an air bag deploys, a priority
emergency signal is automatically sent to the center.
An advisor will locate your vehicle’s position, try to
contact you and assist you in the situation. If the
center is unable to contact you, an emergency service
provider will be contacted.
D Stolen Vehicle Tracking -- Call the center at
1 - 888 - 4 - ONSTAR (1 - 888 - 466 - 7827) to report your
vehicle stolen. The system can then locate and track
your vehicle and the advisor will be able to notify
the proper authorities.
D Roadside Assistance with Location -- For vehicle
breakdowns, press the OnStar button. An advisor
will contact the appropriate help.
D Remote Diagnostics -- If an instrument panel light
comes on, the center can perform a check of the
engine on
- board computer. An advisor can then
recommend what action needs to be taken.
D OnStar MED - NET -- Med - Net can store your
personal medical history and provide it to emergency
personnel if necessary.
D Accident Assist -- An advisor can provide
step - by - step guidance following an accident.
D Remote Door Unlock -- To contact the center,
call 1 - 888 - 4 - ONSTAR. You will be required to
provide your security information. An advisor will
send a command to your vehicle to unlock itself.
The advisor can delay unlocking your vehicle.
Remote Door Unlock is disabled 48 hours after
the vehicle is parked to maintain the battery charge.
D Vehicle Locator Service -- To contact the center,
call 1 - 888 - 4 - ONSTAR. You will be required to
provide your security information. An advisor will
send a command to your vehicle to sound the horn
and/or flash the lamps.
In order to provide you with excellent service, calls with
the OnStar Center may be monitored or recorded.