I got a 2018 Duramax that I bought 8 months ago. Was HP tuned by somebody? Had multiple recalls open, I took to GM dealer in Raleigh who corrupted tune. Looking someone in NC near Raleigh region who can unlock and set up again. No seperate tuner, looks like ECM was sent and reworked then reinstalled. Truck goes in limp mode , clears itself, runs little rough, then back all over again. I dont think I need everything reinstalled just reset up. Found 2 guys near me who could do up to 2016, one man in Concord who said he could reprogram but is 3.5hrs away to tow truck. One guy from my used car dealer can do it but, sayes I need it all at $4k but cant find the parts available. Thanks!!