OnStar Services

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Overview
Cadillac unveiled the 2013 XTS, the newest addition to the Cadillac luxury sedan lineup. It arrives in showrooms in U.S. and Canadian showrooms in the spring of 2012 as the most technologically ad ...

Engine Oil Messages
CHANGE ENGINE OIL SOON This message displays when the engine oil needs to be changed. When you change the engine oil, be sure to reset the Oil Life System. See Engine Oil Life System, Driver ...

Scheduling Service Appointments (U.S. and Canada)
When the vehicle requires warranty service, contact your dealer and request an appointment. By scheduling a service appointment and advising the service consultant of your transportation needs, yo ...