I have begun to roll out a custom tuning service for LB7 and LLY vehicles. LBZ and LMM will be announced at a later time. My focus is on refinement, vehicle feel and response, longevity and efficiency optimization. Naturally you also get power benefits, tailored to your request.
I have spent 3 years exploring all aspects of optimizing the Duramax motor, in real world applications. Let me know if I can help. Michael