Michael has a good point but I agree with JMOR any short that will kill a battery in minutes has to be in the positive heavy main battery cable. Is there a short tube that bolts on the bell housing bolts that the positive cable runs through? Is it shorting out in there? I don’t remember if heavy GM trucks had these but some pickups and or cars did. Anywhere else along the cable that it has a holder clamp around it that may have failed insulation that is shorting. Make sure you double check you connection at the starter so you are sure nothing is shorting there. Is the positive cable rubbing through along the frame or by the exhaust manifold? There is another possibility but it generally would not cause heavy sparking at the battery terminal, this is the possibility of an intermittent connection of a fuseable link. I believe those are located by the starter or on a connection stud on the firewall. If one of those was failing it would seem as though your battery was dead because all power would be lost.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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