
The FASS Drop-In Series DIFSL5P1001 is a bolt-in diesel fuel filtration and air-separation system for 2017-2019 Duramax L5P Crew Cab Short Bed; 2017-2024 Duramax L5P Crew Cab Long Bed. It is designed to retain the factory fuel pump while improving fuel quality before diesel reaches the injection system.
Confirm the exact vehicle, engine, bed/cab configuration, factory filter arrangement, and mounting space. Application-specific differences can affect installation.