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:
Remote Vehicle Start
With this feature the engine can be started from outside of the vehicle.
Starting the Vehicle
1. Press and release on the RKE transmitter.
2. Within two seconds, press and hold until the turn s ...
Headlamp Washer
For vehicles with headlamp washers
they clear debris from the headlamp
lenses.
The headlamp washers are beneath
the headlamps.
Press the washer button at the end
of the windshield wiper le ...
Starting the Vehicle Messages
PRESS BRAKE TO START VEHICLE
This message is displayed when attempting to start the vehicle without first
pressing the brake pedal.
SERVICE KEYLESS START SYSTEM
This message is displayed if ...