Ok, I am going to try and be very detailed. I have a 1999 GMC Jimmy 4Dr 4WD with a 4.3 Engine. A few weeks ago my car would hesiate to start, then would. Last week, it would not start... no turn over, no clicking from the starter. We changed the starter, and it worked... for three days. Now, it is doing the same thing again BUT the starter is indeed clicking when I turn the key. Sounds like a spark noise... its been VERY cold as of late. No clue if that has anything to do with it. Could it be that we didnt tighten a wire tight enough or that it loosened? The battery is testing fine... but I'm gonna try and jump it later. I dont want to bang on the starter because I just bought it. If its clicking, it should just be a connection issue, right? Please help...