Hummer 2003 H2 Owner's Manual page 150

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Remote Diagnostics: If an instrument panel light
comes on, press the OnStar Services button.
An advisor can perform a check of the engine
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on board computer, and recommend what action
needs to be taken.
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OnStar MED NET: Med
personal medical history and provide it to emergency
personnel if necessary. (Requires activation and an
additional fee.)
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Accident Assist: An advisor can provide
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step by step guidance following an accident.
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Remote Door Unlock: To contact the center,
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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.
2-68
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Net can store your
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Vehicle Locator Service: To contact the center,
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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.
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Route Support: An advisor can provide directions or
guidance to most places you want to go. In addition,
they can help you locate gas stations, rest areas,
ATMs, hospitals, hotels, stores, eateries and more.
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Ride Assist: An advisor can locate transportation in
the event that you are unable to drive.
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Concierge Services: The concierge advisor can
obtain tickets, reservations or help with vacation/trip
planning and other unique items and services.