OnStar Services

See also:

If a Tire Goes Flat
It is unusual for a tire to blow out while driving, especially if the tires are maintained properly. If air goes out of a tire, it is much more likely to leak out slowly. But if there ever is a bl ...

Driver Information Center (DIC)
The Driver Information Center (DIC) displays information about the vehicle. It also displays warning messages if a system problem is detected. See Vehicle Messages  for more information. All ...

Total Weight on the Vehicle’s Tires
Be sure the vehicle’s tires are inflated to the upper limit for cold tires. These numbers can be found on the Certification/Tire label. See Loading the Vehicle. Make sure not to go over the GVW ...