Trying to work on a 2006 Silverado 5.3L 4x4 that is jerking at random times while driving with the idle sputtering and at worst times the pedal becomes unresponsive and can take a while for it to become responsive again the steering wheel is stiffer as well sometimes stalling at lower speeds. I changed the spark plugs and wires with new ones and changed the fuel pump. I have a P0101 code I was thinking it could possibly be a MAF sensor issue or possibly a knock sensor issue, but I don't think the knock sensor would cause it to stall?