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:
General Towing Information
Only use towing equipment that has been designed for the vehicle.
Contact your dealer or trailering dealer for assistance with preparing the
vehicle for towing a trailer.
See the following trai ...
Conference Calling
Conference calling and three—way calling must be supported on the Bluetooth
phone and enabled by the wireless service carrier to work.
To start a conference while in a current call:
1. Turn or ...
How to Wear Safety Belts Properly
This section is only for people of adult size.
There are special things to know about safety belts and children. And there are
different rules for smaller children and infants. If a child will be r ...