Collection: Dieselr GM Duramax Tuning

Dieselr GM Duramax Tuning is built for one reason: real performance you can feel on the road. Our custom tuning files are written in-house, tested on actual Duramax trucks, and proven to deliver horsepower, torque, and drivability gains without the hype. Unlike sellers pushing recycled stock files and inflated claims, Dieselr delivers tuning that is measured, repeatable, and built for truck owners who demand reliability.

This collection covers Duramax platforms from early 6.6L models (LBZ, LB7, LLY, LMM, LML through the latest L5P as well as the 2.8L LM2 and 3.0L LWN. Whether you need a single-level file for towing confidence or a full SOTF (Shift-On-The-Fly) setup for versatility, Dieselr tuning is engineered for balance—power when you want it, drivability when you need it. Transmission tuning options also ensure smoother shifts and stronger pulling power under heavy load.

Dieselr GM Duramax Tuning is not about marketing slogans—it’s about files that work, backed by testing and real results. If you want your Duramax to pull harder, drive smoother, and perform the way it should have from the factory, this collection is where you start.