The Tuner Harness Plug Kit includes the plugs needed to seal the factory connectors on your 2017-2019 GM 6.6L L5P Duramax. Easy to install, this kit provides a clean look and keeps moisture and debris out of your factory connectors. FEATURES: Easy to Install Provides a Clean Look Protects Your Factory Connectors Note: CAN Piggy Back Connectors NOT included, required for proper truck operation. Kit Contents: Covers EGR / DPF Plugs