If its anything like the chevy silverado, you turn the ignition to ACC and fully depress the throttle three times. Your change engine oil light should flash a couple of times then go out.
How To Reset Oil Service Light On A Chevy Impala 2007?
If you have a computer that tells you the percentage left or the time before next oil change, go to that section and hold the clear button unit it resets. I have a 2007 CTS and that's how it works on mine.