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:
Wiper Blades
Wiper blades need to be cleaned
and kept in good condition to
provide a clear view.
• Signs of wear include streaking,
skipping across the windshield,
and worn or split rubber.
• Trained ...
Touch Screen Buttons
Touch screen buttons are on the screen and highlighted when a feature is available.
Some screen buttons highlight when active and gray out when inactive. ...
First Engine Oil Change After Every
160 000 km/100,000 Miles
• Automatic transmission fluid change (normal
service). See Automatic Transmission Fluid .
• Spark plug replacement. An Emission Control
Service. ...