Protect Your L5P’s Injection System with Cleaner, Safer Fuel
Your 2017 and newer GMC Sierra or Chevrolet Silverado 2500/3500 with the 6.6L L5P Duramax was built to haul, tow, and work hard. To keep that performance reliable, your diesel needs ultra-clean, air-free fuel.
A FASS Diesel Fuel System enhances fuel quality with advanced filtration, water separation, and air/vapor removal—helping safeguard injectors and pumps while delivering consistent power.
How FASS Improves Fuel Quality
- Air/Vapor Separation: Removes entrained air and vapor that can reduce fuel pressure, weaken combustion, and harm injectors.
- 2-Micron Filtration: Captures microscopic debris and rust particles before they reach the CP4 injection pump.
- Extreme Water Separation: Eliminates over 99% of free water, protecting sensitive injection components.
Boost Power and Efficiency
By maintaining steady fuel pressure and eliminating impurities, a FASS system helps your L5P Duramax run smoother and stronger. Expect sharper throttle response, improved towing performance, and better fuel economy—especially under heavy loads.
Essential for Tuned or Modified Trucks
If your L5P is tuned, equipped with larger injectors, or upgraded for more horsepower, the factory fuel system can become a bottleneck. FASS delivers the consistent, high-volume flow your performance build demands.
Long-Term Protection and Value
Investing in a FASS Diesel Fuel System helps extend the life of your injectors and CP4 pump, reduces the risk of costly failures, and preserves resale value for performance-minded buyers.
The Bottom Line
For any 2017+ L5P Duramax owner, a FASS Diesel Fuel System is a smart, preventative upgrade. It protects critical engine components, supports higher horsepower, and keeps your truck running cleaner, stronger, and more efficiently for the long haul.
