Where is your set reset button located in your Yukon?

If you mean the one for the oil change reminder, if it has a reset button it is in the fuse panel. But just to let you know some years did not have a reset button, you use the accelerator pedal to reset the timer. If you need to do it this way you turn the ignition key on and within 5 seconds, pump the accelerator pedal 3 times and release it, then wait, the "Change Oil Soon" light should flash and go out then it is reset.