KabCoach

On my 1998 GMC Yukon, my ABS warning light comes on in my dash (as if my ABS system was activated?--Even though it wasn't) while at the same time my heat and air cluster does not respond but performs at levels set before the ABS light came on. *Also, my 4WD/2WD indicators go out. *SO, my heat or air will still work. *All attempts to change the output through the control panel fail. *Though the knobs are movable, they have no effect.
Once in a while, some "clicking" sound occurs, the "Brake" light comes on (next to the stuck ABS light), and then a second later, they BOTH go off (almost like a system-reset) and all is normal; my air and heat controls work again, my 2WD light is lit up again. *So, I don't dare use the air conditioner, for fear of that getting stuck on when the problem repeats itself. *--And, it does repeat itself DAILY.

4WD indicator and the Comfort Controls are on the same fuse. *I replaced that fuse. *No effect. *

So, how do I fix this myself? *What do I have to do?