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:
Owner Checks and Services
At Each Fuel Stop
- Check the engine oil level.
See Engine Oil.
Once a Month
- Check the tire inflation
pressures. See Tire Pressure.
- Inspect the tires for wear.
See Tire Inspection.
- Chec ...
Audio Output
Audio from the DVD player or auxiliary inputs can be heard through the
following:
- Wireless headphones
- Vehicle speakers
- Vehicle wired headphone jacks on the rear seat audio system, if the v ...
Engine Fan
The vehicle has electric cooling fans. The fans spinning at low speed during
most everyday driving might be heard. The fans can turn off if no cooling is required.
Under heavy vehicle loading, tra ...