Diagnostics
OnStar Vehicle Diagnostics will
perform a vehicle check every
month. It will check the engine,
transmission, antilock brakes, and
major vehicle systems. It also
checks the tire pressures, if the
vehicle is equipped with the Tire
Pressure Monitoring System. If a
diagnostics check is needed
between e-mails, push 
, and
an Advisor can run a check.
See also:
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 ...
SERVICE KEYLESS START
SYSTEM
If the vehicle has the keyless
access system, this message
displays when there is a problem
with this feature. See your dealer. ...
If the Off Indicator is Lit for an Adult-Size Occupant
If a person of adult-size is sitting
in the front outboard passenger
seat, but the off indicator is lit,
it could be because that person
is not sitting properly in the seat.
If this happens ...