1、Application: The plugs fit for Duramax Diesel L5P 2020‑2022, will go in place of the NOX And DEF Module, the looped wires will provide a closed signal back to the ecm for proper operation. 2、Function: The CAN bus plug provides the critical link between the ECM and the vehicle CAN bus, enabling the vehicle's various systems to communicate effectively and ensuring optimum performance and fuel efficiency. 3、Durable Construction: Plugs are made of ABS material for long lasting durability and are designed to withstand harsh operating conditions such as exposure to extreme temperatures, vibration and moisture. 4、Installation: The installation of the plugs is relatively simple, the plugs are usually located near the ECM, and the installation includes connecting them to the ECM and the appropriate ports on the vehicle CAN bus. 5、Strict Quality Standard: The manufacturing conforms to the standard specification, strictly follows the factory quality control, can be used for a long time.