[truckin 79]

Kind of a weird question but when the 4x4 dial is turned to Auto what color is the indicator light? I have a 2007 Avalanche and I thought whatever mode the dial was turned to whether 4x4 Auto, hi or low the indicator light is green. When I turn dial to the 4x4 Auto is seems like the light is yellow. Is that what color everyone has on their trucks? I do not have any warnings coming up in info display about 4x4 but just want to make sure I am ready for winter.
Thanks