Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Single Sensor

Installed on a 2018 GMC Serra 2500HD.
This is a comprehensive kit, with install basically compromising three component systems.
1) compressor and the bleed down valve. These I installed on a bed bulkhead just above the front of the muffler. Drive line must be removed. see pic.
2) air bags. I think the instructions show the top mount 180 off. Watch the video, and see pics, easy to install.
3) Electrical, I started from the back with the sensor, compressor, drivers side frame rail following the stock wire loom, which i used to tie the air lift loom. Routed into the engine compartment and up to the fuse box where I used a switched misc fuse and the supplied mini blade spade adapter. passed the wire through a hole i drilled into the cowl side of the fuse lid. Lid has fuse diagram, mine was number 36. This is for the 3 amp inline fuse. Pos and Neg wires wired to battery.
4) air lines, I used the Schroeder valve bracket on the receiver hitch, air line driver side of the spare tire zip tied to frame, see pics.
This took me a full nine hours to install, some wasted time trying to decipher the top mount orientation, which seems to be drawn wrong in the instructions. Watch the video online, helps a lot. I do not think that this was overly complicated, just take each system and install them and tie it all together. I had to do some adjusting on the sensor as initial 5 lbs pressure with the sensor setting caused the compressor to turn on and pumped to 11 PSI. I Just lowered the sensor till I had a pump pressure of seven PSI. Love it. 694028

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One of the best improvements to our 2018 GMC HD2500. We use a 8.5 Sand S camper, and the air bags and onboard compressor keep the truck at stock ride height, so no night time light to high problem. Compressor comes on with the key on whenever the sensor tells it to level. Havent touched it since it was installed, just the way I like it

Craig N - 08/27/2020

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by: Joe 07/12/2022

I have an air ride fifth wheel hitch has four small bags one on each corner I mounted one airlift bag in the middle and the air compressor to that bag so when the small bags lose pressure due to temperature the compressor takes care of it works awesome1325900

by: Andrew02/15/2022

Had this on my 3500 towing my 5th wheel camper for a year now and it keeps the truck level. It is reliable and smooth riding. Helps handling while towing like I could not believe.1262991

This airlift smart lift 2 is the best idea yet! I had the wireless one and the module went out. I looked for a replacement and finally decided to just air it up manually.
Then this version became available. Just what I needed. The weak link in the wireless one system is no longer needed. Just load the truck and let the system take care of the rest.
I love it. Thanks Air lift!

Ps. The price match guarantee is a real thing.

Thanks etrailer.com!860362

Still loving my air lift auto leveling system. Still working great. Great value. No need to worry about proper amount of air in the bags. It’s automatic. Thanks etrailer.com!

Tracy - 08/12/2021

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by: Corey08/02/2022

AFTER 4 MONTHS THE COMPRESSOR TOOK A CRAP, ETRAILER WARRANTIED IT. A MONTH AFTER THAT THE MAGNENT FOR THE COMPRESSOR BROKE IN HALF. (WE FIXED IT) AND 2 MONTHS AFTER THAT THE SOLENOID TOOK A CRAP. SO NOW ITS ALL BACK TO MANUAL AIR. I WONT WASTE MY MONEY ON THIS SETUP AGAIN..1344745

by: Jeffrey02/03/2019

I tow a 5th wheel camper & boat around the country in search of great fishing adventures. The Airlift is a necessity for my F-150 Ecoboost. I have met people on my travels that did not have the automatic leveling and they had regretted not getting it after seeing how my truck was self-leveling. It doesn’t matter if I am towing the camper or the boat or just running into town for groceries, my truck level is always perfect for the job at hand. If you’re towing heavy loads, the Airlift 5000 is excellent and I highly recommend the automatic “SmartAir System”. Don’t forget to order your Airlift kit with the Stainless Steel hardware option. I was able to install both kits by myself in a day. The online instructions were very helpful.602262

I still love it! We needed some gravel for the yard and I was able to carry 1 1/2 tons with no problems. Don’t forget to upgrade your tires & brakes if you’re going to do this.

Jeffrey - 02/11/2020

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by: Steven 01/23/2022

Operations are perfect. I drive 8-10k miles a month and always have a trailer behind me. Constantly changing my loads and the system works great. The pump is Kinda loud but it doesn't bother me.1251037

by: Jeremy01/18/2019

Great product if your looking for an easy way to keep your truck leveled. Like that the kit is fairly easy to install and I can hook up a trailer and the Smart Air system takes care of the rest.598645

by: Clint10/08/2020

I like the system. Easy to install and very convenient. One problem though. The compressor turns on and off by a magnet being out of center with a sensor. When you hook up, the sensor drops below the magnet, the compressor kicks on and inflated the bags until the sensor is level with the magnet again
then the compressor shuts off. If your load is too heavy, it will never level out and therefore the compressor will never turn off. My compressor burnt within a year of purchasing because of this. Airlift sent me another compressor for free, but it's only a matter of time until this happens again. Airlift doesn't have any data on maximum tongue weight with this system before you have that problem. But I can say from experience that it can't handle 9500 pound tongue weight.898865

by: John03/23/2021

This lift assist works great. I did have to replace the air pump at 10 months old. The warranty covered it all... I have an older one on a PU and it still works great.992440

Product works great, instructions included were a little sketchy, and i was missing some parts, so be sure to verify package content before beginning install. cant wait to put it to the test and get my trailer hooked up. 485755

by: Darin04/18/2019

After 1 year I am happy to say it has not given a minutes worth of trouble. The truck hauls lumber and construction supplies almost daily and it just does what it is supposed to do without anyone having to do a thing. I have this same system on another truck that has been working for about 10 years now and it also has given no problems. I would not have an airbag setup without this auto leveling system.630990

by: Kirk 11/13/2021

worked great 1202965

by: Ricky01/24/2021

The kit came with everything that I needed it was an easy install. The The compressor seems a little louder than it should be but I guess that is the design of it.942245

e-trailer proved excellent customer support during a recent back-order. Updates were timely and I was advised that the items were now in stock and shipping.

Excellent vendor...I will use again and would highly recommend them to anyone.547025

Amazing shipping times and great produc t!1165640

by: Virgil01/31/2021

Works as designed 948460

GREAT COMPANY,VERY FAST SHIPPING,GREAT PRODUCTS.734411

Price was good free shipping and it arrived in two days the install was not difficult 703974

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by: Nick05/31/2022

Review from a similar SmartAir II in Air Suspension Compressor Kit

This is a nice product to have on any truck that is used for towing, hauling and really picking up or dropping off anything when your away from a compressor. I was actually able to make this work on a coil spring truck. I mounted the sensors on the frame and the magnets on the top 4-link trailing bar. I would definitely recommend this product over the single sensor kit if your going to be loading the bed a lot with various weighted items. I gave it 4 stars as i had some issues with my passenger side bag not inflating but was able to get that resolved. USE dielectric grease on all of your electrical connections as most people will be mounting it to the underside of their trucks. I would have liked to see this kit come with het shrink terminals or at least some heat shrink for the terminals This kit recommends tapping into circuits that only have power while the key is in the RUN position, I used the sunroof circuit and the heated seats but I did play with the idea of tapping into the headlights as you might be able to control when this system is operational. All in all, its a pretty darn good kit. I like having the dual sensors and that its a set it and forget it system that only kicks in when you need it. Just make sure to do it right the first time and protect your electrical connections.1307140

by: Walter04/12/2022

Review from a similar SmartAir II in Air Suspension Compressor Kit

First set was delivered in horrible condition. Looked like UPS dragged the box from the factory to the delivery behind the truck. Contacted E Trailer and Airlift. Air Lift provided a new set at no cost. Self installed in about 6 hours. Original compressors were under capacity. When truck was loaded compressors got so hot the hoses melted. E Trailer replaced both compressors with upgraded units and they work great.1285110

Review from a similar SmartAir II in Air Suspension Compressor Kit

To be installed 12/6/21. Will update with photos after installation1215856