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Description
Airdog II-5G 220 GPH Air Fuel Separation Lift Pump System 11-16 6.6L GM Duramax LMLWhy GM opted to not include a factory fuel lift pump on all of the early model Duramax's is still a mystery. This lack of consistent fuel pressure coupled with the switch from the proven CP3 to a CP4 injection pump beginning in model year 2011 has spelled disaster on these trucks, especially for those trying to increase the horsepower through performance programmers and or larger displacement injectors. Even at stock power levels, this insufficient
Why GM opted to not include a factory fuel lift pump on all of the
early model Duramax's is still a mystery. This lack of consistent fuel pressure coupled with the switch from the proven CP3 to a CP4 injection pump beginning in model year 2011 has spelled disaster on these trucks, especially for those trying to increase the horsepower through performance programmers and/or larger displacement injectors. Even at stock power levels, this insufficient fuel pressure and volume equates to limited overall power, decreased fuel economy, and potentially harming the
injection pump and injectors due to a lack of lubrication.
The
AirDog II-5G is an all in one premium fuel pump and filtration system
for your 2011-2016 LML Duramax diesel. This system removes water,
particulates, and entrained air from the diesel fuel. The entrained air
that is separated from the fuel is returned to the tank through a small
return fitting. The fuel is delivered to the engine at the correct
pressure and flow rate to meet the demands of the engine under all
operating conditions.
The AirDogII-5G
DF-220 systems feature a built in adjustible diaphragm pressure
regulator. All AirDog II-5G systems include a complete installation kit.
The AirDog II-5G, for this particular application, is preset at 8-10
psi from factory for a stock application. The regulator is adjustible up
to 55 psi for fine tuning the system to perfectly match up to your
current and future performance upgrades.
HOW IT WORKS:
The
AirDog II-5G DF-220 draws fuel from the fuel tank through a 5/8”
suction line to reduce the risk of cavitation at the pump. The fuel is
then drawn through the water separator where 92% of water is removed per
SAE spec 1488. It is then pressurized through a Gerotor pump and sent
to the 2 micron fuel filter before it is sent to the injection pump. The
air from aerated fuel, due to tank sloshing and engine return lines, is
separated and sent back to the tank through the 3/8” return fitting.
The excess fuel that the engine does not use is recirculated through the
diaphragm regulator back to the suction side of the pump.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 4
GIFT CARD AS REPLACEMENT, NO CHOICE OF CHECK OR REPLACEMENT. GOOD COMPANY
PROS:
* A decent company, responsive and fair.
* Allows you to buy items from anywhere you want, and buy the warranty at Amazon.
* Provides better coverage than other warranties, and covers more, including breakage!
CON:
They don't send you a check in order to buy wherever you want, send a replacement, or give you a choice. Instead, they send you an Amazon Gift Card. That's OK if you're a big Amazon shopper, but sometimes, you can get a better price elsewhere.
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Reviewed in the United States on December 10, 2025
★★★★★ 5
Asurion has been outstanding. Their customer service is quick, reliable, and efficient.
Every time I’ve had a problem, Asurion has been outstanding. Their customer service is quick, reliable, and efficient, and they handle claims with minimal hassle. It’s reassuring to know they actually follow through and resolve issues promptly.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Good protection, easy process
First time filing a claim. Super easy and fast. Nice to have have protection and a smooth claims process when the unfortunate happens..
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Ease of making a claim and quick return time for claim.
Very easy to work with.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Easy Claims Process
It is not a long complicated process to file and resolve a claim. Be warned--sometimes they will want you to send back the defective or damaged product, even if it's not worth the shipping ---they pay. Overall worth the investment though.
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Reviewed in the United States on March 22, 2026