Range Technology RA003R Plug & Play AFM/DFM Active Fuel Management Disabler (Package may vary)

Works like described, Just remember to unplug it if you don’t drive your vehicle every day

It works amazing

This device is instant. I love it. I own a 2010 Chevorlet Avalanche LT. I never knew nothing about this technology. My retired Coworker told me about it actually at a funeral. I ordered it. I called him and gave him the biggest thanks. The range is litterally saving my engine from ruin. Every time the Avtive Fuel management system kicks in I hear the lifters and pistons knocking and rocking. Thats a scary sound to me because that engine is under load doing that. The range device stopped all of that. My old V8 vortex engine is a happy girl now. Im loving the full time power especially when im climbing up 280 westbound here in New Jersey. We got some serious hills here and they are murder on transmissions and engines. I dont even care about the fuel mileage because I do drive local and local driving tears your car up anyway on the feul side. My truck runs so smooth now I dont have to play with the gas pedal anymore fearing that im damaging the engine. Now I drive with more confidence. Going up hills is smoother and I can actually keep up with traffic. The Avalanche was never speed pourpose built but now she moves. I took it other highway for a 40 minute drive yesterday to go somewhere usually I be in the right lane letting everyone go past me at speed but now I keep up with traffic. Its definately worth the money. All you do is litterally plug it in let it work its magic for a couple of litteral seconds and drive. It does not have any negative impact to your vehicle at all. Im so happy now.

Easy to use, its servers its function with no lag of speed. Doesn’t change any computer programming permanently or cause any engine lights. Decent price for the quality.

Disables afm. Does its purpose. I have gotten a slight improvement in fuel economy, especially when doing highway driving. I reset trip miles both time and these are pictures of before installing Range and after installing Range

Have had this in my 2016 Yukon with the 5.3 motor and 6 speed transmission for a month now. Works very well. Vehicle stays in V8 all the time with no other ill effects. I drive a lot of straight lines at 38 - 40mph which is when I would occasionally get the GMC shudder if I was slowing and speeding up often, but this completely eliminated it. I've not noticed any major change in fuel economy at this point, last I looked the average was down 0.1mpg if any. Would recommend this for sure! Easy to start using. Plugged it in to the port under the steering wheel, the lights flashed for 5 seconds or less, then good to go. Started the car and went for a drive, immediately worked. I considered the cheaper options here for $100 or so but decided it was worth another $100 to get the Range brand name and not goof with anything in my car. Just an update after 30 days of use: Still working very well, but I am noticing more of a full 1mpg fuel economy loss. Most of my day to day driving is around town, runs under 5 miles. I live 3 miles from work, so that definitely does not help, and dollars and cents wise is a very small impact, but wanted to update a larger economy loss than originally posted.

I have been extremely impressed with this Range AFM disabler since I first used it in May 2025. Besides the obvious fact that you will use more gas staying in V8 mode. It offsets the mild shudder without it and the brief hesitation when cruising at 75 and open it up. I didn’t notice any battery drain while I left it plugged in. (Always start vehicle with Range plugged into OBD and turned off while still plugged in) Lastly, here in MA we have to have yearly inspections and I unplugged Range minutes before the machine was connected to my OBD. Range has no affect on your MA state inspections. No red flags, no issues at all Absolutely love the Range AFM disabler

I'm very disappointed to have to leave this review I had high expectations from all the positive reviews that were written. I got the product plugged it into the OBD2 plug waited a few minutes started the vehicle instantly check engine light came on. My Suburban is 9 years old I'm the original owner and it less than a hundred thousand miles on it and I've never had a check engine light come on for any reason. I decided to call range Technology support line and ask them about the unit and what the recommendations were.. I got through immediately and spoke to the biggest jerk. He blamed me for the problem said it was a existing code that must have been on my vehicle and that their product never causes any problems like this. I told him that I had read reviews that show that it does sometimes cause a cel to appear. he said that was not true and he advised me to unplug it start the vehicle and then plug it in I did so I still had the light decided I wasn't going to take the chance of this screwing up my vehicle so I unplugged it took it to the Chevy dealer and ran diagnostic on it and show 3 codes. 1 include is a transmission code P0700 and two other codes u0073 and u0100. The dealer cleared the codes and I've had no problems driving it for the rest of the day. check engine light has stayed off the vehicle runs like it used to I would recommend reading some of the negative reviews on this product before you take the chance of using it on your vehicle certainly don't expect much help from Range Technologies at least not from the person that I spoke to. I would definitely never use one of these devices on any of my vehicles ever again.

My truck is a 2017 gmc sierra 1500 with a 6.2motor, 8 speed trans. It has been a night and difference for the better. Better fuel mileage, smoother shifts, more power at any given moment. My truck is a beast let out of its cage, or the perfect work horse pulling away. I have had this in my truck for three months. No shaking or hesitant shifts, just a very happy truck. Worth every penny. Just buy and thank me later.

easy install,instantly sounded different, better performance all across the board,truck shifts better, gas mileage on day to day driving was a tad bit better,on a highway trip towing an atv trailer my gas mileage wasnt as good but a decent trade off for better power on the hills, will i keep it installed? most definatley!

It is working as described. Should have bought it years ago!

What a game changer! My 2019 Denali 6.2L engine was using oil considerably. Had it to the dealership and they installed new cylinder heads . This did not fix the problem. Then GM would not honour it after warranty ran out 2 months later .I heard of this range product and bought it .Fingers crossed but my truck has stopped using oil . It runs the way a v8 should now .The power and response is unbelievable!,thanks

J’ai pas mis cinq étoiles (mais je pourrais) J’ai un Silverado, 2017 v8 5.3L presque 200 000km Mon pick-up fonctionne très bien Mais cette histoire de transmission qui cogne m’énervait Au prix qu’on paye un pick-up ! J’ai acheté ce petit boîtier, en espérant que ça change quelque chose en désactivant le 4 cylindre Et impeccable ! Je sens que mon pick-up roule normalement Avec plus aucun cognement On verra sur le long terme Mais je pense que le moteur va éviter de s’encrasser Et de prolonger la durée de vie de la transmission