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:
Thigh Support Adjustment
If available, adjust the manual leg
extension by reaching under it, in
the pocketed area. Press the button
and pull or push to lengthen or
shorten it. Release the button to
lock it in plac ...
Airbag System Check
The airbag system does not need regularly scheduled maintenance or
replacement. Make sure the airbag readiness light is working.
See Airbag Readiness Light.
Notice: If an airbag covering is dam ...
Express-Down/Up Windows
Windows with the express feature
allow the windows to be raised and
lowered all the way without holding
the switch.
Press or pull the switch fully and
release it to activate the express
fea ...