Pontiac 2004 Grand Prix Owner's Manual page 158

OIL LIFE REMAINING: Press the gage button until OIL
LIFE REMAINING is displayed. This screen indicates
the percentage of oil life in the vehicle's engine that has
not degraded. If the screen indicates 99% OIL LIFE
REMAINING, this means that 99 percent of the current
oil life remains. When the oil life drops below five
percent, the CHANGE OIL SOON message will appear
on the display. The engine oil should be changed
within 200 miles. Be sure to keep a record of the
mileage and date of the oil change so you will have it
for future reference.
Never drive the vehicle more than 10,000 miles
(16 000 km) or 12 months (whichever comes first)
without an oil change.
After the oil has been changed in the vehicle, reset the
ENGINE OIL MONITOR screen in the options menu.
Press the gages button again to advance to the
next screen.
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TRANSMISSION FLUID TEMP: This screen displays
this message along with the temperature (F° or C°)
of the transmission fluid.
Press the gages button again to advance to the next
screen.
BATTERY: This screen displays the amount of volts
the battery is generating.
Press the gages button again to advance to the next
screen.
ENGINE HOURS: This screen shows the number of
cumulative hours the engine has operated while the key
was in the RUN position. This screen cannot be reset.
Press the gages button to scroll to the next screen.
ENGINE BOOST: If the vehicle has the supercharged
engine, this screen will appear. It shows a graphic
that indicates the amount of boost the engine is
receiving.
Press the gages button again to scroll to the next
screen.