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:
Safety Locks
Rear door safety locks prevent passengers from opening the rear doors from
the inside.
Press to activate the safety locks, the LED in the switch illuminates.
Press to deactivate the safety ...
Wiper Arm Assembly Protection
When using an automatic car wash, move the windshield wiper lever to OFF.
This disables the automatic Rainsense windshield wipers and/or rear wiper.
With Rainsense, if the transmission is in N (Ne ...
Automatic Operation, If Equipped
AUTO: Press the air delivery mode button until this setting is selected to control
the inside temperature, air delivery, and fan speed. AUTO appears in the display
when automatic operation is acti ...