The Duramax L5P 2017–2023 Delete Software package delivers custom GM Duramax delete tune files that clear every emission-related code on your L5P — "See Dealer" codes, check engine lights, "Exhaust system service required" alerts, and limp mode all go away once the delete tune is installed.
You get the GM/Duramax L5P software files with Sh...
Reviews
4.0
6 ratings
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L5p tuner
Very nice product
M
Michael · May 19, 2026
Tunes
I had ordered tunes for my truck. That truck was subsequently totaled before I could install the delete. Having all the hard parts I reached for tunes for my new truck, next day and with a discount due to circumstances. I will only do business with them from now on.
A
Alexander · June 25, 2025
computers
While the software worked fine for the first 1800 miles. I took a trip using cruise control. set off Regen. truck is still currently with check engine lights GDP has tried many times to resolve the issue. even telling me to buy credits to update my TCM. just to find out it needs unlocked just like the ECM. so those credits are wasted. what they don't tell you is the only way to reset the DPF regen. is to install all the factory sensors. so do not cut or throw anything away you will need them when this happens. I have now paid 758 dollars in "repairs". that were not necessary. I will not be recommending there software be used..