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:
Turning the System On and Off
The system can be disabled through the Driver Information Center (DIC).
See “Park Assist” under Vehicle Personalization (With DIC Buttons) on page 5‑46 for more information.
URPA defaults ...
Climate Controls
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
D. Air Conditioning
E. REAR (Rear Climate Control)
F. Recirculation
G. Rear Window Defogger
Dual Automatic Climate Control S ...
Cleaning the Mirror
Do not spray glass cleaner directly on the mirror. Use a soft towel dampened
with water. ...