Question about 2003 GMC Envoy
Go into the vehicle settings with the radio controls. With the key turned to ACC, hold DISP on the radio for about 6 seconds and it should go into settings mode. Press DISP until you see oil life in all caps, then use Prev. & Next to scroll to reset oil life mon., then push DISP again. you should here a beep and the display should read Done. Scroll to Exit and press DISP again. Good luck
Posted on Jul 11, 2010
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Posted on Jan 02, 2017
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Mar 06, 2011 | 2004 GMC Sierra 1500 Crew Cab
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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