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It's called a general electric module or GEM on these trucks and they do go bad with age or with a leaky windshield. Usually when those go though, the stuff just stops working, it doesn't leave a code. Does anything else in the truck like the dome lights not work?
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No everything works besides the 4WD. There is no indication on the dash that something is wrong but it does throw that code.
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Played around with a multimeter and found out that I am not getting any voltage to my transfer case motor when I put the switch in the 4x4 position.....
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What's the plan? just replace one piston?
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Is there also valve contact on that piston?
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Pretty much needs a whole motor. Cheap way out would be to sleeve this one cylinder, and replace all the pistons. I'm not sure what that would do for longevity. I'm glad it's not my truck
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It definitely looks like 2 valves got a little intimate with the piston.
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How does that happen? Timing chain wear? Who's truck? 7.3L?
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That's a 6.4 powerstroke. Timing is gear driven on a majority of modern diesels. This is the result of bad tuning, either written with too much timing or someone put a giant tuner on and just beat the **** out of it. This truck has 2 melted pistons and the heat marks on the rest were pretty close to melting.