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Feels like stuck in tow haul


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Ok so on the way to church this morning everything was fine until about 15 mins into the drive I stop at a light and took off and it started driving like in tow haul mode. This is an 06 duramax, I put it in M and it shifted fine but still kinda like tow haul because it’s in M, it shifts a little above 2k and doesn’t downshift, CEL came on not sure what’s going on please help!

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20 minutes ago, casey.mikl said:

First, need to have the code read. If you know anyone with a reader. Or autozone can do it. And go from there


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I had it read and there’s a power train loss of communication and some kind of trans malfunction codes ou1000 and PO700

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49 minutes ago, casey.mikl said:

Yes. Over time, parts wear out. It could be a bug and just lost communication, or there could be something wrong. Can’t really tell over the computer. Someone with more info will hopefully add information in


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Thank you 

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