It seems since I brought my truck into the dealer for the 3 cylinder high idle cold start enabling my grid heaters haven't worked. I see the wait to start light come on but the voltage doesn't change. I have to plug it in even at 0'C now or it won't start. Lots of white smoke for the first few minutes when I do get it running . Could there be another problem I'm missing maybe? Can a dealer possible program stuff to mess up or maybe accidentally delete my grid heaters somehow?