This 2 - wire unlock cable, part number GDPCOMM9000, is a must - have for flashing 2017 and up L5P Duramax engines. It fits 2017 - 2023 GMC/Chevrolet HD models with a 6.6L Duramax engine. Use it as an unlock or bypass cable to ensure smooth engine flashing.

Using this unlock cable is straightforward. First, make sure your vehicle is turned off. Connect the cable to the appropriate ports in your 2017 - 2023 GMC/Chevrolet HD with a 6.6L Duramax engine. Then, you can start the flashing process. Remember, this cable is required for successful flashing. When not in use, store it in a dry place to prevent damage. If you notice any signs of wear or damage, replace the cable immediately to avoid issues during flashing.