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 
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Advisor can run a check.
See also:
Lumbar Adjustment
Power Lumbar
If available, press and hold the front or rear of the control to increase or
decrease lumbar support. Release the control when the seatback reaches the
desired level of lumbar su ...
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 ...
Interior
Five occupants get to enjoy soft all-leather seats. Offerings include heated
and ventilated seating and a heated steering wheel. The STS features genuine
eucalyptus wood and aluminum trim.
Eight ...