WHILE DRIVING MY 2014 CHEVROLET SILVERADO THE AC UNIT BEGAN BLOWING WARM AIR. I AM NOW FORCED TO DRIVE MYSELF AND MY INFANT SON WHILE BEING EXPOSED TO POTENTIALLY LETHAL TEMPERATURES INSIDE THE CAR. EVERY TIME I REMOVE MY SON FROM HIS CAR SEAT HE IS SWEATING. IN ADDITION, IF IT IS RAINING OUTSIDE MY WINDOWS BECOME ALMOST IMPOSSIBLE TO SEE OUT OF SINCE THE DEFROSTER IS LINKED TO A PROPERLY WORKING AC UNIT. GM KNOWS ABOUT THIS SYSTEMIC ISSUE IN ALL SIMILAR VEHICLES AND HAS REFUSED TO RECTIFY THE HAZARD OR MITIGATE THE HEAT EXPOSURE TO MY CHILD.