Fine Line Muffler-N-Automotive

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I have an 05 LLY Duramax and was experiencing major issues with my tuner. never been here before and after expressing the urgency of my concerns they went above and beyond to try and help me, reaching out to tech support and borrowing a personal tuner to try and reconfigure my tune. although they couldn't remedy the issue they made it feel like a priority where as others shrugged it off. very grateful just for the time they invested in the attempt! highly recommended shop!