TTY Users
OnStar has the ability to communicate to the deaf, hard-of-hearing, or speech-impaired customers while in the vehicle. The available dealer-installed TTY system can provide in-vehicle access to all of the OnStar services, except Virtual Advisor and OnStar Turn-by-Turn Navigation.
See also:
Radio Reception
Frequency interference and static can occur during
normal radio reception if items such as cell phone
chargers, vehicle convenience accessories, and external
electronic devices are plugged into ...
Once a Month
• Tire inflation check. See Inflation - Tire Pressure.
• Tire wear inspection. See Tire Inspection and
Rotation. ...
Additional Required Services
Every 12 000 km/7,500 Miles
► Rotate tires. Tires should be rotated every 12 000 km/ 7,500 miles. See Tire Rotation
.
At Each Fuel Stop
► Engine oil level check. See Engine Oil .
...