I have a 2000 chevy astro. I recently tried to get over a tall pile of snow. I tried to move the snow from under the van, but I couldn't get it all removed. I put the van in reverse and pushed on the accelerator. i got out of the bank of snow, but my steering wheel is hard to turn and i have to push down the brake pedal all the way. The brakes don't stop suddenly. I have to push the pedal closer to the floor. What could it be?