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Help! Tcm
2003 duramax lb7 edge evolution cts 4" exhaust are the only mods on the truck So today I was driving my truck down the highway, I was hauling ass racing a Trans am when my truck shifted down a gear and was stuck in that gear. I pulled off and read the code on my tuner, it said it was the Tcm...- tomhardin2013
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- Forum: 6.6L Duramax Diesel
