If youre close to Golden try Bodacious Diesel off 6th and I-70, had a great experience just the other day with them and they didnt charge me an arm and a leg. Didnt even have to do any work on my truck, just cleared codes, ran a few tests and truck is running great now. Dumb me ran my tank almost dry hauling my 10k 5er and also corroded battery cables left me sitting on c-470 for an hour or so.