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master mechanicHey whats up I think I know the answer to your question, as bad as it may sound i would say replace your harness wiring, but before i do that I would inspect my harness wiring real good to make sure i do not have any loose connections. could be a fuseable link somewhere in your harness wiring that poped a loose and could be touching causing it to short out the alternator and battery. last but not lease, start by checking your connections coming from your battery leading to the alternator that should solve the problem.

gsiefer- I had this problem. I replaced every sensor, even rebuilt the engine -mostly because it had 221K miles on it. 3800's are made to run 200K. But that's about it. The gaskets become junk on upper engine. With Proper oil changes the lower end will last. The problem was the computer. It had a short internally. I found a new computer on eBay and it runs like new.

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Q: Why does my Pontiac transport shut off driving down the road like someone turned the key off and then turn back on like normal It also has the battery going dead but everything shows good It's like?
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