Unable to Connect to OnStar Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message
may come on. Push 
to try the
call again or try again after driving a
few miles into another cellular area.
See also:
Lamp Messages
SERVICE LEFT HEADLAMP ASSEMBLY
On some models, this message will be displayed when the left headlamp is out
and needs to be serviced. See “LED Lighting” in LED Lighting for more
infor ...
Brake Assist
(Except CTS-V)
This vehicle has a brake assist
feature designed to assist the
driver in stopping or decreasing
vehicle speed in emergency driving
conditions. This feature uses the
stability system hydrauli ...
Tow/Haul Mode Light
For vehicles with the Tow/Haul Mode feature, this light comes on when the Tow/Haul
Mode has been activated.
For more information, see Tow/Haul Mode . ...