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 methylcyclopentadienyl manganese tricarbonyl (MMT). We recommend against the use of gasolines containing MMT. See Fuel Additives for additional information.
See also:
Lamps On Reminder
For vehicles with the lamps on reminder light, it comes on when the lights
are in use. ...
Point of Interest (POI)
The Point of Interest (POI) destination entry method lets you select a destination
from the POI list.
Point of Interest: Press to access
the POI (Point of Interest) screen. From this screen yo ...
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 ...






