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:
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the vehicle's engine power is reduced.
Reduced engine power can affect the vehicle's ability to accelerate.
If this message is on, but there ...
Control of a Vehicle
Braking, steering, and accelerating are important factors in helping to
control a vehicle while driving. ...
Shoulder Belt Height Adjuster
The vehicle has a shoulder belt height adjuster for the driver and right front
passenger positions.
Adjust the height so the shoulder portion of the belt is on the shoulder and
not falling off of ...