icanfixall
Official GMM hand model
I think if you leave the colum shifter in park it will start anytime you try. If you just want the engine to fire up run a jumper wire from the positive battery directly to the top front wire on the injection pump. Thats the large spade connecter of the tow up there. Hear the click from the solenoid opening for return flow and then jumper the fender starter solenoid. It will fire. Do this with the key on position too so the glow plugs will warm up.