First check for diagnostic fault codes. They will indicate the circuit or system that needs further diagnosis. There's a page on this site on how to do that. I'll describe it for you if you can't find it. Check if the automatic shutdown (ASD) relay is turning on during cranking. The easiest way to do that is to measure the voltage at the ignition coil or any injector on the wire that is the same color at all those places. That's usually a dark green wire with an orange stripe. You should see 12 volts there for only one second after turning on the ignition switch, then it must come back during engine rotation, (cranking or running). If it does not, suspect the crankshaft position sensor or the camshaft position sensor.
Jump-starting another car should not be related unless, (possibly) it was a GM product.
Wednesday, October 31st, 2012 AT 10:27 AM