USING THE RADIO:
Follow this procedure to reset the GM Oil Life System.
Turn the ignition to ACC OR ON, with the radio off.
Press and hold the TUNE DISP button on the radio for at least five seconds until SETTINGS is displayed.
Press the SEEK PTYPE or the SEEK PSCAN up or down arrow to scroll through the main menu.
Scroll until OIL LIFE appears on the display.
Press the 1 PREV or 2 NEXT button to enter the submenu. RESET will be displayed.
Press the TUNE DISP button to reset. A chime will be heard to verify the new setting and DONE will be displayed for one second.
Once the message has been reset, scroll until EXIT appears on the display.
Press the TUNE DISP button to exit programming. A chime will be heard to verify the exit.
USING THE ACCELERATOR PEDAL:
Follow this procedure to reset the GM Oil Life System.
Turn the ignition to ON, with the engine off.
Fully press and release the accelerator pedal three times within five seconds.
If the CHANGE ENGINE OIL message flashes, the system is reset. However, if it stays on , it did not reset. Repeat the procedure.
Source(s):GM Service Manual
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.
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