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:
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See the Maintenance
Schedule for more information. Things that are especially important in trailer operation
are automatic transmission ...
Adjustable Throttle and Brake Pedal
The vehicle has adjustable throttle and brake pedals that allow you to change
their positions.
The feature will not operate when the vehicle is in R (Reverse) or while using
the cruise control.
...
Universal Remote System Programming
If the vehicle has this feature, you will see these buttons with one
indicator light next to them in the overhead console.
This system provides a way to replace up to three remote control tran ...