See also:

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 acces ...

STABILITRAK OFF
This message displays when you turn off StabiliTrak, or when the stability control system has been automatically disabled. The TCS/StabiliTrak warning light on the instrument panel cluster al ...

Malfunction Indicator Lamp
A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors the operation of the vehicle to ensure emissions are at acceptable levels, to produce a cleaner environment. This li ...