Pretty simple Fuel filter change on a 2021 Silverado 1500 with the LM2 3.0L Duramax Diesel. Per GM document from Service Information: 1. Clean Housing 2. Drain Water/Fuel Separator 3. Remove Water Separator Assembly 4. With assembly upside down, remove filter from cap 5. Remove and discard 2 o-rings 6. Clean Cap, Install Cap o-ring […]