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Description
Airdog II-5G 100 GPH Air Fuel Separation Lift Pump System 15-16 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 2015-2016 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-100 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-100 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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4.2 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
I'll probably be buying another one for my husband.
Color: 301 Yellow
This warmer works very well. You can remove the silicone mat to accommodate larger cups if, like me, you like to use larges mugs. It has multiple temperatures that come in handy as you get to the bottom of your cup and want to reduce the temperature so the last few of sips aren't too hot.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Finally
Color: 301 Black
I bought a different coffee warmer for myself, maybe 4 years ago. I live in an area that has very cold winters, and I could never enjoy even one cup of coffee in the morning without it turning quite cold halfway thru. So I bought this other warmer. It improved my situation, but only slightly. At its hottest setting, my coffee was, at best, tepid warm within 15 minutes. I finally got fed up with it and purchased this model, noting that it's warmest setting was reported to several degrees higher than my earlier one. I'm delighted to report, it works! It definitely keeps my coffee noticeably warmer, right to the end of the cup. It falls short of being "piping hot", but I'm not sure that would even be desirable. Call it "comfortably hot". I'm very glad I tried this model.
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Reviewed in the United States on April 11, 2026
★★★★★ 5
Consistently Warm Cup Every Time
Color: Black, Color: Black
I resisted getting an electronic coffee warmer, because I hadn't had one in years. I am so glad that I changed my mind. I am no longer having to microwave my coffee again and again as it gets cold. I love that this coffee warmer has multiple temperature options. I love that I can adjust the number of hours (1-12) until I would like it to automatically shut off. It heats up quickly, so you needn't plan ahead. When you want it, it is fully functional on the spot. Since it has a heating function, my policy is to unplug it when not in use. I wouldn't give this as a gift, not because it isn't awesome, but because owning it requires a personal commitment to using it responsibly. And you must have a suitable cup. My cup, as you see here, is a celodon cup. It heats perfectly well even though the base has a shallow rim rather than a flat bottom, which makes direct contact with the heating table. If you have a similar cup, be assured that will be just fine and your coffee or other liquid will stay warm. Its versatile functionality and beautiful design make this an excellent value for the money. To me, there's nothing like a good cup of coffee in the morning and this warmer makes all the difference as it is uniformally a perfect cup, even if I get interrupted.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Nice size and works well
Color: Black
I got this to replace a rather inexpensive mug warmer that had quit working just a few months after purchase. This one is nice, you can adjust the temp, adjust how long it stays on, and it has an easy to read display so you know them temp and auto shut-off time. Its versatile as it fits a variety of mugs/cups and it works really well.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Best mug warmer I’ve ever had!
Color: Black
This does what I had hoped my other two mug warmers would do. Actually keep my coffee hot. I also love that I can set the timer so that I don’t accidentally leave it on. Additionally, my other two warmers were activated by setting the cup down on the warmer, which meant that if somebody sat something else beside a coffee cup on it, it burned it. And that did happen. This one is only hot when you turn it on. I can also change the temperature settings and choose how long I want it to be on up to 12 hours. I definitely will buy this again for another room in the house.
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Reviewed in the United States on May 29, 2026
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