Description
2017-2023 Duramax L5P DieselR GDP Commander T87A/T93 Transmission Tuning
The 2017–2023 Duramax L5P DieselR HP Tuners Transmission Tuning is a custom tuning solution designed to improve the performance and drivability of your truck’s transmission. This tune refines shift timing, torque converter lock-up, and line pressure to deliver smoother, quicker shifts and enhanced towing capability. Built for both daily drivers and heavy-duty users, it helps unlock the full potential of the Allison transmission.
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