A little more info 4.2 xlt, checked all the lights work, headlights, turn signals, dome, instrument cluster, connected a scan tool to obd connector no codes set, mil light is off, looking at electrical diagram power from switch goes through transmission safety switch then to starter motor relay, before energizing starter. any fuses to check i could have missed, when I said it wouldnt start, in doesn't even turn over. any thoughts? what about starter motor relay?