The other day i was driving home in the snow and i was going up a hill in 2wd. My tires started to spin but i kept of truckin up the hill. As i was reaching the top all of a sudden my ABS light and brake light came on. The brakes seemed to still work fine but I lost my ABS. I was doing some research on the internet and some people said it was due to the brake sensor....anybody have any insight on this situation? The truck has some aftermarket 20" rims with 35" M/T's.