2001 Chevy Suburban 1500 sunroof controls

Interior problem
2001 Chevy Suburban 1500 Four Wheel Drive Automatic

There are 4 white rubber buttons on the drivers side of my sunroof/moonroof ceiling console. From the windshield : Full Open, Close, Vent and The one that flashes red or green or both, depending.

The red & green flashing drives me nuts. How do I re-set this button? My owners manual doesn't deal with this as it clearly isn't updated to this model ( shows an older photo).

There is probably a really simple way to reset, but I don't know it---please help!

Thanks!