I bought 2013 Durmax Dually 3 years ago. not my first diesel but first pickup with DPF. Last fall CEL came on. can't recall code, took to GM dealer, they replaced knock sensor. cost me over $800. I'm reading about all the sensors on my truck , DPF and EGR problems. My truck only has 39K miles. Trying to decide if I should look into deleting emissions. dpf and egr. I'm not looking to "Roll Coal" nor do I want 600 hp. I just want a dependable truck. I've already added airdog lift pump and use opti-lube additive after reading about stock fuel pump failure . I know deleting my truck is illegal. I'm from Pa, No emission testing, seems like every diesel, pick up, log truck, coal truck is deleted. I use my truck to pull 15k lb 5th wheel. I don't need more power. I found a few vendors where i'm at now in Florida that have tuners, do deletes, install exhaust, etc. Should I go for it ? they both can do a single tune. $150 and $225. or should I spend more and get H & S mini Max or EFI live ? I don't want smoke. go with dpf delete pipe and leave cat converter on ? I don't think I have a muffler. I see at least 3 or 4 sensors on it. Thanks for your replies. Be easy on me. first time asking for help.