The L5P CAN Bus Plug Kit for 2017–2023 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax L5P is required when you remove the DPF (Diesel Particulate Filter) and DEF (Diesel Exhaust Fluid) systems.
These plugs go in place of the NOx and DEF module connectors and provide a closed signal back to the ECM so i...