Customer service like this is rare. They actually answered the phone, helped with install questions, and even followed up later to see how the truck was running.

Bought a used 2011 LML and didn’t realize how bad the emissions issues were. It was in regen constantly, fan loud all the time, and throwing CELs like crazy. I did some digging and found Diesel Patriots. Their kit arrived fast and fit like OEM. The tune flashed without a hitch, and the truck immediately started smoother. Fuel mileage jumped and it doesn’t sound like it’s working overtime anymore. Support was on point — fast, clear, and helpful the whole way through.

Tow heavy five days a week for work and the emissions setup was killing performance. Post-delete, the difference is unreal. Truck finally holds power without choking on hills.

Deleted my 2011 GMC 2500 and the difference was instant. Turbo spools quicker, idle is quieter, and I don’t have to baby it up hills anymore.

Most companies disappear after the sale — not these guys. Diesel Patriots followed up, answered all my questions, and made sure the install went smooth.