I have a 2014 GMC Sierra. I jumped another car. While doing so I tried to press the accelerator, nothing happened. I then took the cables off and placed my truck into reverse, the dials would not show what I was in. While trying to back up my accelerator would not work...and my power steering went out. I turned the truck off and then on again, but there was still no power steering and the accelerator wouldn't work. Now my truck won't turnover, but the battery is operational. We have checked the battery and all fuses and they are all good. No clue ehats going on with my truck.