FASS Drop-In Series Fuel System Adaptor Kit for: LM2/LZ0 Duramax 3.0L, 2021+ GMC/Chevrolet 1500-Series SUVs

FASS Drop-In Series Fuel System Adaptor Kit for: LM2/LZ0 Duramax 3.0L, 2021-2026 GMC/Chevrolet 1500-Series SUVs & 2021-2024 Cadillac Escalade/Escalade ESV

The LZ0ADPT1001 can be added to the DIFSL5P2001 to create fitment for the: 2021-2026, all SUV configurations with LM2 & LZ0 3.0L Duramax.

THE Drop-In System IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump.

Note: Drop-In Fuel Systems are plug and play filtration upgrades and are not compatible with Fuel Sump Kits. System retains the OEM fuel pump.

The FASS Drop-In Series Diesel Fuel System is engineered to be the most effective filtration solution for the 3.0L Duramax. Backed by a limited lifetime warranty, it protects against issues caused by fuel contamination.

If you drive a GMC, Chevrolet, or Cadillac SUV with a 3.0L Duramax diesel engine and want better fuel filtration, improved reliability, and injector protection, without an external frame-mounted pump but with simple installation, this is the perfect solution.

The FASS Drop-In Series System for the LM2/LZ0 Duramax replaces the plastic OEM single filter housing with a precision, in-house designed and CNC'd 6061-T6 billet aluminum dual filter housing made right in the heart of America. 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 (WIF) sensor to operate correctly, notifying you before the water reaches the clean side of the fuel filter element. Many other systems on the market use 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 to 2 microns and removing over 99% of free and emulsified water. OEM filtration provides only a 5-micron filtration rating, allowing larger particulates to pass through to your injection system.

Reliability, Simplicity, Protection

• Seamless Integration: Works flawlessly with the factory fuel system on GMCs, Chevrolets, and Cadillacs
• Injector Protection: Will triple the life of your fuel injection system
• FASS Filtration: Optimizes combustion, restores horsepower, maximizes MPG (results vary)
• Limited Lifetime Warranty: Register your FASS system for coverage

Advanced Filtration Technology

• Water Separation: 3rd-party proven to eliminate over 99% of water
• Air/Vapor Removal: Eliminates entrained air and vapor that damage injection systems
• 2-Micron Absolute Microglass Filtration: Removes smaller debris than OEM filters

Key Benefits

• Improves Reliability: Potentially triples the injection system life
• Maximized Horsepower: Improved fuel atomization and restored timing
• Optimized MPG: More efficient combustion (results vary)
• Peace of Mind: Extreme Water Separator acts as a fail-safe
• Cold Weather Confidence: Dependable starts in extreme cold
• Cleaner Operation: Reduces DPF regens and soot
• Improves Fuel Lubricity: At least 10% improvement

Key Features

• Only drop-in 3.0L Duramax filtration system that retains the OEM water-in-fuel light
• Only drop-in 3.0L Duramax filtration system with air separation
• 100% drop-in installation; no drilling or modifications needed
• Retains factory lift pump
• Performance Radius Cuts (PRC): Smoother internal fuel flow
• 2-micron absolute filtration rating: Captures finer debris than OEM
• Removes over 99% of water: 3rd-party verified
• Patented air/vapor removal process
• Heater options available for cold weather
• Limited Lifetime Warranty (with registration)

What’s Included in the DIFSLZ02001 FASS Drop-In Series

• (1) FASS Drop-In Series Air Separation/Filtration System
• (1) FASS XWS3002 Extreme Water Separator
• (1) Installation Kit Including All Necessary Hoses, Fittings, Bracketry and Hardware

Why Choose FASS?

FASS designs fuel systems with longevity and real-world performance in mind, as well as ease of installation and service. The Drop-In Series offers proven filtration and injector protection without altering the OEM configuration, ideal for daily drivers and work trucks.

What Other Options Does FASS Recommend?

• Upgrade your OEM plastic filter housing with a FASS Billet Fuel Filter Cap.
• Monitor your filter life and so much more with FASS Connect.
• Prepare for future maintenance with a FASS Filter Pack.
• Defy cold-weather gelling with our FASS Heater Elements.

Vehicle Fitment by Year

• 2022 Chevrolet Tahoe – 3.0L Duramax (LM2)
• 2022 Chevrolet Suburban – 3.0L Duramax (LM2)
• 2022 GMC Yukon – 3.0L Duramax (LM2)
• 2022 GMC Yukon XL – 3.0L Duramax (LM2)
• 2022 Cadillac Escalade – 3.0L Duramax (LM2)
• 2022 Cadillac Escalade ESV – 3.0L Duramax (LM2)
• 2023 Chevrolet Tahoe – 3.0L Duramax (LM2)
• 2023 Chevrolet Suburban – 3.0L Duramax (LM2)
• 2023 GMC Yukon – 3.0L Duramax (LM2)
• 2023 GMC Yukon XL – 3.0L Duramax (LM2)
• 2023 Cadillac Escalade – 3.0L Duramax (LM2)
• 2023 Cadillac Escalade ESV – 3.0L Duramax (LM2)
• 2024 Chevrolet Tahoe – 3.0L Duramax (LM2)
• 2024 Chevrolet Suburban – 3.0L Duramax (LM2)
• 2024 GMC Yukon – 3.0L Duramax (LM2)
• 2024 GMC Yukon XL – 3.0L Duramax (LM2)
• 2024 Cadillac Escalade – 3.0L Duramax (LM2)
• 2024 Cadillac Escalade ESV – 3.0L Duramax (LM2)
• 2025 Chevrolet Tahoe – 3.0L Duramax (LZ0)
• 2025 Chevrolet Suburban – 3.0L Duramax (LZ0)
• 2025 GMC Yukon – 3.0L Duramax (LZ0)
• 2025 GMC Yukon XL – 3.0L Duramax (LZ0)
• 2026 Chevrolet Tahoe – 3.0L Duramax (LZ0)
• 2026 Chevrolet Suburban – 3.0L Duramax (LZ0)
• 2026 GMC Yukon – 3.0L Duramax (LZ0)
• 2026 GMC Yukon XL – 3.0L Duramax (LZ0)