GDP MPVI4 SOTF/Multi-Tune Support Package (2017-2023 6.6L L5P Duramax) c_cooler_upgrade Plug-and-Play Convenience: Features factory-style connectors

Plug-and-Play Convenience: Features factory-style connectors for straightforward installation with minimal hassle—no splicing or complicated wiring required

These are guys that don’t want the MM3 device in each vehicle

or those who need to keep the truck in an optimal operating range

lower EGTs

GDP MPVI4 SOTF/Multi-Tune Support Package (2017-2023 6.6L L5P Duramax) c_cooler_upgrade Plug-and-Play Convenience: Features factory-style connectorsFor those wanting just a tune and not the actual device, we are able to offer tunes only. This requires the purchase of a new support pack for the VIN# of the new truck being tuned. Please note that this package includes the tune file exclusively and does not come with the MPVI4 device.