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:
Engine Oil Life System
The engine oil life system calculates engine oil life based on vehicle use
and displays the CHANGE ENGINE OIL SOON message when it is time to change the
engine oil and filter.
The oil life system ...
Storing Memory Positions
To save into memory:
1. Adjust the driver seat, including the seatback recliner and lumbar, both outside
mirrors, power steering column, and the throttle and brake pedals.
See Power Mirrors ...
Head Restraint Adjustment
Do not drive until the head restraints for all occupants are installed and adjusted
properly.
To achieve a comfortable seating position, change the seatback recline angle
as little as necessary w ...