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 
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Advisor can run a check.
See also:
Customer Satisfaction Procedure (Mexico)
Did you get the Warranty Extension Plan? This plan is recommended by General
Motors to supplement the warranty included with the new vehicle purchase.
See your dealer for details.
Customer Assis ...
Deleting Tracks from MEM
Individual tracks and all tracks can be deleted from MEM.
To delete individual tracks, press and release the DEL button while the
track is playing.
To delete all tracks from MEM, press and hold ...
Sunroof
A. Open or Close
B. Vent
On vehicles with a sunroof, the sunroof only operates when the ignition is in
the ACC/ACCESSORY or ON/RUN, or when Retained Accessory Power (RAP) is active. See
Retain ...