A couple of weeks ago my key fob started acting weird. what i mean by weird is it wont unlock when i press the unlock button... i thought is was the battery so i changed it. nope, not the problem. i would try my other key fob that i got when i bought my truck but well how do i put this.... it was ran over by a fire truck.... i work for a volunteer FD and it fell out of my pocket in the station and the truck ran it over and i didn't notice it till we got back... any tips or ideas what it could be???

I have a 2003 sierra 1500... if that helps...