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  1. C

    Need help!! Have 02 gmc 2500hd lb7 duramax transmission is in limp mode!

    I have an 02 lb7 it has been ever deleted straight piped everything else is stock as far as I know other than me buying a bully dog gt tuner and installing on the truck but 4 days after tuning it with bully dog trans went to limp mode and screen on tuner is saying it’s limped to 4th gear… I have...
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