Your 2017 or newer GMC or Chevrolet truck, powered by the robust 6.6L L5P Duramax diesel engine, is a beast. It’s built for towing, hauling, and tackling tough jobs with impressive power and reliability.
But even the best engines can benefit from optimization, especially when it comes to their lifeblood: fuel. That’s where a FASS (Fuel Air Separation System) Diesel Fuel System comes into play, transforming your Duramax’s performance, longevity, and overall ownership experience.
While the factory fuel system on your L5P is fairly stout in terms of fuel flow, there’s room for improvement with regard to filtration.
If you’re looking to get the absolute most out of your Duramax, whether it’s improved fuel economy, longer injection system life, or the headroom for performance upgrades, a FASS system is a game-changer.
Here’s why investing in a FASS Diesel Fuel System is a great idea for your 2017+ GMC/Chevrolet truck with the L5P Duramax:
Superior Fuel Filtration and Water Separation: The First Line of Defense
The L5P Duramax utilizes a sophisticated common-rail injection system operating at incredibly high pressures. This precision demands ultra-clean fuel.
Contaminants like air, debris, and water can wreak havoc on your expensive injectors and high-pressure fuel pump (HP4).
By eliminating air and vapor from your fuel, along with over 99% of the water, FASS systems provide significantly improved filtration compared to the stock setup. They typically incorporate multiple high-efficiency filters designed to capture particles much smaller than what the factory filter can handle.
Furthermore, the FASS Extreme Water Separator acts as a fail-safe in the event of extreme fuel contamination. This proactive approach can save you thousands of dollars in potential repair costs.
Elimination of Air in Fuel: Smooth and Consistent Performance
Air and vapor in your fuel system can lead to inconsistent fuel delivery, resulting in:
- Reduced Power: The engine isn’t getting the consistent fuel supply it needs.
- Reduced Fuel Economy: Inefficient combustion due to air in the lines.
- Rapidly Increased Injector Wear: Air pockets can cause the injectors to hammer, and create cavitation within your injection system. FASS systems continuously remove air and vapor from the fuel, ensuring a consistent and reliable supply of clean diesel to your engine. This translates to:
- Increased fuel lubricity by at least 10%
- 3x injection system life
- Optimized MPG (results will vary)
- Restored horsepower
- Sharper throttle response
- Reduced soot (smoke) output
Options to Suit YOUR Needs
We offer both Drop-In Series and Titanium Signature Series Fuel Systems for 2017+ GMC Sierras and Chevrolet Silverados with the 6.6 Duramax diesel engine.
Drop-In Series Fuel Systems provide:
- Complete FASS fuel filtration while utilizing your factory in-tank lift pump for fuel flow
Please Note: Drop-In Fuel Systems are not a fuel pump —these kits maximize fuel quality while retaining the factory pump - 90-120 minute installation using basic hand tools
- No cutting, drilling, or wiring required
- Over 99% water removal
- Air and vapor separation
- Debris filtration down to 2 Microns absolute
By comparison, Titanium Signature Series (and Titanium Signature Series PLUS ) Fuel Systems provide:
- A complete replacement Fuel System that improves both filtration and flow
- The “No-Drop” version of our Titanium Signature Series and Titanium Signature Series PLUS Fuel Systems includes our Single-Bolt Fuel Sump Kit in one convenient package
- Over 99% water removal
- Air and vapor separation
- Debris filtration down to 2 Microns absolute
- Fuel flow to support stock or modified L5P Duramax engines at any power level
Headroom for Performance Upgrades: Fueling Your Future Power
Speaking of performance-enhancing modifications like tuners, larger turbos, or upgraded injectors, a FASS Diesel Fuel System gives you “room to grow”.
As you install items like larger injectors, turbos, and more aggressive tuning, a FASS Diesel Fuel System can easily cope with increasing fuel flow demands as power levels rise.
Complete FASS Fuel System Kits are available for L5P Duramax engines at every power level—from bone-stock to 1,500+ horsepower and more.
Protecting Your Wallet: The Investment that Pays for Itself
While FASS Diesel Fuel Systems are often seen as a performance upgrade—the biggest benefits to most FASS customers are:
- Drastically longer injection system life (3x or more in many cases)
- Protection from water contamination
- Optimized MPG (results will vary)
- Inexpensive maintenance (replacement FASS Fuel Filters cost roughly $60, and typically only need to be changed 1x per year)
Of course, these aren’t the only reasons to install a FASS Diesel Fuel System on your 2017+ GMC/Chevrolet. In addition to the cost-savings of FASS, these fuel system kits also offer:
- Optional Electric Heater Kits for cold-weather driving
- Drastically improved fuel flow
- A Limited Lifetime Warranty
- Missouri-based customer support
- And more!
Have questions about which FASS Diesel fuel System is right for your L5P Duramax? Contact us today !
The post Why a FASS Diesel Fuel System is a Must-Have for Your 2017+ GMC/Chevy L5P first appeared on FASS Diesel Fuel Systems | In God We Trust.
