See also:

Mobile Apps
Mobile apps are available for download through iTunes® to then access the iPhone® App Store and Google™ Marketplace for Android™. Search for the apps to download. The apps are free of char ...

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 v ...

Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See the Maintenance Schedule for more information. Things that are especially important in trailer operation are automatic transmission ...