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:
Climate Controls
The heating, cooling, defrosting, and ventilation for the vehicle can be controlled
with these systems. ...
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level. See Engine Oil .
Once a Month
Check the tire inflation pressures. See Tire Pressure .
Inspect the tires for wear. See Tire Inspection .
Che ...
Dome Lamps
The dome lamp controls are located in the overhead console.
(Dome Lamp Override): Press to turn
the lamps off, even when a door is open.
(Door): Press to turn the lamps
on automatically when ...