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:
Fuel E85 (85% Ethanol)
Vehicles that have a FlexFuel badge and a yellow fuel cap can use either
unleaded gasoline or ethanol fuel containing up to 85% ethanol (E85).
See Fuel E85 (85% Ethanol). For all other vehicles, u ...
Address Book
The address book entry method lets you select a destination by selecting an address
that has been stored in the address book.
Address Book: Press to access the
Address Book screen. From this s ...
Passenger Safety Belt Reminder Light
When the vehicle is started this light flashes and a chime may come on to
remind the front passenger to fasten their safety belt. Then the light stays on
solid until the belt is buckled.
This ...