FASS Drop-In Series Fuel System for 2020 to 2025 GMC/Chevrolet, Duramax 6.6L

FASS Drop-In Series Fuel System for 2020 to 2025 GMC/Chevrolet, Duramax 6.6L (DIFSL5P2001)

GMC/CHEVY Drop-In Product Manual Downloads

THIS IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump.

The DIFSL5P2001 Fits: 2020-2025 Crew Cab Short Bed L5P Duramax

Note: Installation on cab and chassis may require modifications. Drop In Fuel Systems are plug and play filtration upgrades and not compatible with Fuel Sump Kits. System retains the OEM in tank fuel pump.

The FASS Drop In Series Diesel Fuel System is engineered to be the most effective filtration solution for the 6.6L Duramax. Backed by a limited lifetime warranty, it protects against issues caused by fuel contamination.

If you drive a GMC/Chevrolet with a Duramax diesel engine and want better fuel filtration, improved reliability, and injector protection without an external frame mounted pump, this is the perfect solution.

The FASS Drop-In Series System for the L5P Duramax replaces the plastic OEM single filter housing with a 6061-T6 billet aluminum American made dual filter housing. This system utilizes the OEM water separator element in conjunction with our 2 micron Extreme Water Separator. Utilizing the OEM water separator element allows the water-in-fuel sensor to operate correctly, notifying you before the water reaches the clean side of the fuel filter element. Many other systems on the market utilize a spin-on water separator that places the WIF sensor on the clean side of the filter meaning by the time your WIF light is triggered, it’s too late! Our Extreme Water Separator provides the final particulate and water filtration filtering particulates down 2 microns and removes over 99% free and emulsified water. OEM filtration provides a 5 micron filtration rating allowing the larger particulates to pass through to your injection system.

Reliability, Simplicity, Protection

Supports Stock & Modified Duramax: Plenty of fuel for stock and modified GMCs and

Vehicle Fitment

• Chevrolet Silverado 2500 HD V8 (2020-2024)
• Chevrolet Silverado 3500 HD V8 (2020-2024)
• GMC Sierra 2500 HD V8 (2020-2024)
• GMC Sierra 3500 HD V8 (2020-2022)

Prop 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more info: www.P65Warnings.ca.gov