Reset service light indicator, engine oil life Cadillac STS, year 2005, 2006, 2007, 2008, 2009, 2010 reset instructions:
Turn the ignition to run (one position before starting engine).
Press the up or down arrow to scroll the DIC to show OIL LIFE.
Once the XXX% ENGINE OIL LIFE menu item is highlighted, press and hold the RESET button until the percentage shows 100%.
Turn the ignition off and then start the engine to verify the indicator has been reset.