Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Rear Climate Control System (Rear Climate Control Only)
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
For vehicles with the rear climate control system, the controls are located on the rear of the center console. The system can al ...
Services for People with Disabilities
Advisors provide services to help subscribers with physical disabilities and
medical conditions.
Push for help with:
○ Locating a gas station with an attendant to pump gas.
○ Finding ...
English and Metric Unit Conversion
To change the display units between English and metric units, see Driver Information
Center (DIC) on page 5‑23 for more information. ...