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:
Gasoline Specifications
(U.S. and Canada Only)
At a minimum, gasoline should
meet ASTM specification
D 4814 in the United States or
CAN/CGSB–3.5 or 3.511 in Canada.
Some gasolines contain an
octane-enhancing additive
called methylcyclop ...
Easy Exit Driver Seat
This feature moves the seat rearward allowing the driver more room to exit
the vehicle.
To activate, place the ignition in OFF and open the driver door. If the
driver door is already open, placin ...
Tires
Use a stiff brush with tire cleaner to
clean the tires.
Notice: Using petroleum-based
tire dressing products on the
vehicle may damage the paint
finish and/or tires. When applying
a tire dr ...