I changed the oil when dash was showing 10% oil life but after the oil change a week later its now saying 5% oil life change oil soon... how do i fix this????

Alero

2000-01

Turn the ignition to the ON position, engine OFF. Press the RESET button and release. The CHANGE OIL indicator will start flashing
2000: Press and release the RESET button again.
1999: Press and hold the RESET button until an audible chime is heard and then release the button.


Intrigue

2000-01

Turn the ignition to ON without starting the engine. Fully press and release the accelerator pedal three times within five seconds. If the CHANGE OIL SOON indicator flashes two times, the system is resetting. Turn the key off after the the light has finished flashing, then start the vehicle. If the CHANGE OIL SOON indictor comes back on, the engine oil life monitor has not reset. Repeat the procedure again. If the vehicle is equipped with the U20 option code, the vehicle as an oil life low indicator. The oil life low indicator shows an estimate of the oil's remaining useful life. When the oil life index is less than 10 percent, the display will show OIL LIFE LOW. To reset the oil life monitor, press and hold the MODE button until the light appears next to OIL LIFE. Press and hold the trip RESET button until the oil life percentage changes to 99 percent.


Alero,
Intrigue,
Cutlass Supreme

1999,
1998,
1996-9

To reset the "CHANGE OIL" light, turn the ignition switch to the "RUN" position with the engine off. Fully depress and release the accelerator pedal three times in five seconds. The light will flash twice and go out.


Aurora

1995-99

To reset the "OIL LIFE" message, press the "ENG" button with the ignition on until "OIL LIFE PERCENTAGE" is shown. Press the "RESET" button for 5 seconds. "RESET" will appear and then "OIL LIFE" will show 100%


Eighty-Eight,
Ninety-Eight,
Regency

1994-97

When "CHANGE OIL NOW" is displayed, press the "RESET" button. Press "SEL" to display "OIL". Press "SEL" to display oil life. Press and hold "RESET" for 5 seconds. A "RESET" message should display with oil life changed to 100%.


Eighty-Eight,
Ninety-Eight

1992-93,
1991-93

Press and release the "TEST" button on the Driver Information Center. This will illuminate "CHANGE OIL NOW" if it is not already illuminated. Press and release the "OIL" or "OIL INDEX" button. Next, press the "RESET" button and hold for at least 7 seconds.


Toronado,
Trofeo
w/o CRT Display

1991

To reset "OIL LIFE INDEX", press the "2 OPTIONS" button: three times if the vehicle is equipped with a phone and compass, once if equipped with neither. While "OIL LIFE INDEX" is displayed, press and hold the "RESET/ENTER" key at the bottom right of the 15 button switch for 5 seconds.