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Discussion Starter · #1 ·
I have a 03 duramax with the alison tarns. I put an edge on it about 2 years ago and now it is not going into reverse sometimes and when it does go into drive it is like it is starting off in a higher gear. It is showing some bad codes when we plug it into a computer none of the chevy people can figure it out or even want to try has anyone ever had something happen like this????
 
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