Onstar.com
The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service.
Get subscription plan pricing and sign up for OnStar Vehicle Diagnostics. Click on the “My Account” tab on the home page.
See also:
Customer Assistance
Offices (U.S. and Canada)
Cadillac encourages customers
to call the toll-free number for
assistance. However, if a customer
wishes to write or e-mail Cadillac,
the letter should be addressed to:
United States
Cadilla ...
Engine Coolant Temperature Warning Light
The engine coolant temperature
warning light comes on briefly when
the vehicle is started.
If it does not, have the vehicle
serviced by your dealer. If the
system is working normally, the
...
Keyless Unlocking
With the keyless access transmitter
within 1m (3 ft), approach the front
door and pull the handle to unlock
and open the door. On some
models there is a touch sensor on
the door handle. If t ...