Unlock the full potential of your L5P truck with our custom tuning!
You must send your stock ECM file read to sales@dieselpartdeals.com after ordering and include your order #. Please also send us your MPVI3 serial # when sending your stock file. Perform a read on the ECM ONLY, do not include the TCM together when performing the read.
Product Information:
- A Windows Laptop with active internet access, HPTuners MPVI3 device, and 6 HPTuners credits are required in order to flash the 2017-2023 L5P ECM
- You must ALWAYS use the latest HPTuners BETA software and resync your MPVI device (HPtuners VCM Editor BETA -> help->resync) , download the latest BETA here https://files.hptuners.com/VCM%20Suite/VCM%20Suite%20(Beta).msi
- 2017-2018 Trucks require an ECM unlock kit, which can be purchased here: https://dieselpartdeals.com/collections/l5p-tuning/products/e41-ecm-unlock-kit-2017-2023-l5p-duramax
- 2019-2023 Trucks can be unlocked directly by the HPtuners MPVI3 device, so you do not need the unlock device
- ONLY compatible with MPVI3 device. Older generation devices cannot unlock the L5P ECM.
- Switch on the Fly is operated using the cruise control buttons, see instructions here - https://www.hptuners.com/pub/HPTuners_SOTF_UserGuide_20210222v1.1.pdf
- Transmission tuning is highly recommended when adding power. Please see these links to purchase TCM + transmission tuning:
Power Levels:
- Optimized Stock 0HP
- Heavy Tow 50HP
- Light Tow 100HP
- Street 150HP
- Max Effort / Race 200HP+
- SOTF 0-200HP+