Spare Tire
Your vehicle, when new, had a fully-inflated spare tire. A spare tire may lose air over time, so check its inflation pressure regularly.
After installing the spare tire on your vehicle, you should stop as soon as possible and make sure the spare is correctly inflated. Have the damaged or flat road tire repaired or replaced as soon as you can and installed back onto your vehicle. This way, a spare tire will be available in case you need it again.
Do not mix tires and wheels of different sizes, because they will not fit. Keep your spare tire and its wheel together.
See also:
Brake Adjustment
Every time the brakes are applied, with or without the vehicle moving, the brakes
adjust for wear. ...
Time and Date Settings
From the Time and Date Settings screen button, press to display the Time and
Date Settings menu.
Set Time: Press + or − to increase or decrease the Hours and Minutes displayed
on the clock. ...
Automatic Crash Response
In a crash, built in sensors can automatically alert an
OnStar advisor who is immediately connected to
the vehicle to see if you need help. ...