Range Technology Corded Electric Active Fuel Management Disable Device (Blue)

This unit really works. My new 2018 Silverado 1500 ("e" model) was running well before I plugged it in the OBDII socket, but I wanted the option of disabling this V8-V4 mode because of what had happened to my friend's 2011 Sierra 1500 (excessive oil consumption between scheduled oil changes due to worn rings on an otherwise meticulously maintained truck. This was traced to a lack of proper lubrication in V4 mode, an issue supposedly fixed since in the newer models). I just couln't afford to take any chances at having to go through an engine disassembly so soon in my truck's life. I mean, how long have they been messing with V8s? They should have left these engines alone instead of messing with cylinders 1, 4, 6, and 7. Since I do mostly highway trips, my mileage has actually improved, not by much, but it shouldn't have if you believe the GM hype. You really have to wonder why all this V8-V4 complexity was added to a perfectly good V8 if as, in my case, my mileage improved!!! The ONLY thing I miss at times (easily fixed by shutting down the truck and just unplugging it from the OBDII socket) is some engine compression braking in hills from the V4 mode. It helped me maintain a set cruise speed going down some hills with a light 2000 pound trailer load, and the fact that the engine no longer shuts off at stops or red lights (the "e" model has the Lithium battery pack and induction motor to spool up the engine under these conditions but it won't do any of that while this particular unit is plugged in). Other than that, I have the V8 I expected now, the mileage is fine and hopefully I won't have issues with failing parts in cylinders 1,4,6 and 7. The added complexities of these otherwise old V8's should be a cause for concern. They use a special camshaft ground differently just for cylinders 1,4,6 and 7, they have a higher-volume oil pump, and a pressure relief valve to handle the incessant oil/computer controlled operations of the intake and exhaust valves in these 4 cylinders and this device just stops all this from happening without reprogramming anything. I could be wrong of course, but I think the pressure relief valve should have no issues handling the changes for the life of the engine. The rest is literally put to sleep while this device is plugged in. If you want to take your truck in for maintenance, say while it is still under warranty, just remove it before going into the stealer. They will never know. Hopefully I'll never have to go in for expensive repairs due to failures with cylinders 1,4,6 and 7. Make sure you get this device with the latest firmware as it is now totally stealthy to Onstar's big brother monthly reporting. Range Technology has done its homework. I don't work for them, I'm just a happy customer and would recommend this to anyone just wanting back the V8 truck they thought they bought.

Shame on GM for putting an 8 speed transmission into a 5.3 Chevy Silverado with AFM! I've owned a 2016 Silverado 1500 with a 5.3 4X4 for about 6 months and I totally hated it. That was until I found this little gem. I was going to wait to get a programmer, but I didn't want to go to that extreme. I've made a few observations pre and post Range AFM disable. Before the symptoms I had were a lot of throttle lag, the transmission would jerk in and out of gear while in v4 mode and when switching to and from V8/V4 modes. There was a slight shutter on light to moderate acceleration. It was like the truck did not know whether or not to go into the next gear or in or out of v4 mode. I spend most of my time driving on 45 MPH roads and the drive-ability with the Chevy at these speeds was horrible. While the truck was in 8 speed driving around at 45 MPH and in traffic, the engine and drive train was always in a state of lag or being lugged down. There was virtually no throttle response. The only way the truck was drive-able was to nail the throttle to get the RPMs up and change into a lower gear. Can someone please tell me in the infinite wisdom on GM's part how that saves on gas???? Enter the Range AFM disable. Now I can drive around at 45 MPH and if I need to gas it, the truck will easily go into another lower gear and move. Mostly now I can drive around and in traffic and the truck stays in the 8th or 7th gear without any problems at all. There is one anomaly I have noticed, and this I think is the reason for some bad reviews, is that this did throw a check engine light already. What I figured out was, as soon as I let my wife drive the truck, she throws the thing in gear and hits the accelerator before the starter barely finishes turning over the engine. Every time I've gotten into the truck to drive it I've took my time and gave the Range plug enough time to initialize. I am totally sold on this device and it has made thew driveability of this Chevy 300% better with the AFM disabled. Gm should take some notes here and learn from their horrible mistake. This is causing them to loose sales. Consumers should not have to purchase devices to make a truck run better. They should make this a switchable option from the factory!

The Chevrolet Camaro SS automatic (L99 engine) was built with AFM (active Fuel Management) which puts the car into 4 cylinder mode when the car is under light load. While in theory this seems like a good idea and helps GM meet the Federal CAFE standards. In practice, for a high performance car such as this it's horrible! You can hear and feel when the car goes into 4 cylinder mode. There is a slight lag when needing power to pass, or just accelerate a bit to keep up with traffic and a HORRIBLE "Farting" sound as residual fumes are detonated when the car comes out of 4 cylinder mode. Until now, the ONLY way to disable AFM was to have your car tuned that can and will void the 10 year, 100k mile powertrain warranty. I wasn't ready to do that so begrudgingly decided to keep driving a FART car!. Enter the RANGE V8!!! This simple device plugs into your OBD-II port that fools the car into believing current conditions are not right for the car to enter 4 cylinder mode without reprogramming the ECM. At first I was a bit skeptical. But after reading some initial reviews from early adopters I bought one. IT ABSOLUTELY WORKS as advertised! I Plugged it in and took my car for a quick test drive. IMMEDIATELY (before I even got out of my subdivision) recognized that AFM was not engaging. A longer test drive confirmed this. At a later point, I removed the device and AFM began engaging again which proves to me the ECM was not reprogrammed. This is truly the best of both worlds. I can used the RANGE v8 when I want. When I take a long highway trip and am interested in keeping my MPG high, I simply remove the RANGE V8. For my daily driving (when AFM bothers me the most), I keep it plugged in. Simple two minute (if that) install. Unbox, and plug into the easily accessible OBD-II port. Highly recommended to anyone that is bothered by the AFM. I understand this works on ALL GM vehicles with AFM.

First off. I was skeptical about these devices and did a LOT of research on which one is the best and how they work vs a AFM DELETE. I have a 2017 gmc sierra 6.2 v8. When I first plugged it in, my truck screen glitched a bit on the infotainment center. I turned off the truck let it sit for a minute. And restarted. Not only does it start better. It rolls better when you let off the gas. The engine doesn't slow the truck down anymore when swapping to v4. Transmission shifts smoother since it's not swapping from v4 to v8. It made my engine quieter, stronger. Better throttle and smoother ride. I highly recommend! (Hint. If you don't drive your vehicle all the time. Unplug it after about 3 days of non driving. It will slowly drain battery a small amount. Says this in instructions too.) Best of luck!

Does not work on 2015 Silverado nor a 2009 GMC as bought AFTER TURNING TRUCK OFF. HOOOOOOOOOOOOOOOOOWEVER, after finding out the item actually came from a 3rd party (Zennith Performance) and may be OUTDATED (old software version) according to the actual maker, Range Technology...I sent it back to Amazon and said 3rd party. I thought I had purchased it from Range but that was not the case even though Range does sell on Amazon they say. I was unable to find their page and have since purchased one from the actual RANGE web site (also has choice of 3 led color's) and after speaking with them, was told it would be the latest and greatest version and would work with my 2015 Chevy. I will update more when that gets installed. Check Warning on Authorized dealer/sellers on Range Technology web site! ACTUAL PRODUCT USE: after installing the unit "AFTER" trucks were started, I got a blinking light and then a steady light. Unit seems to work very well in solving my AFM vs. 6-speed fight on whose in control problem and truck ran very smooth and was pleased. It worked good in the 2009 GMC also BUT when trucks were turned off, unit would also turn off. Once trucks were restarted, Unit DID NOT restart and that forced a disconnect/re-connect of unit to wake it up with truck running. I will update this review once I have the up to date unit from range Tech... Add't Notes: You also get your out of date unit, older units updated for Free, see Range Technology web site. UPDATE: Got my new unit from Range with Version 8 loaded. Installed it and went down road and truck went from V8 to V4...WTHO? It then went back to V8 and hasn't changed since, stays in V8 with steady blue light. Goes off when truck is off, comes back on when truck started. No faults are showing on dash or anything and truck run awesome and smooooth1 So far so good. A winner I think and ONLY BUY FROM RANGE!!

2 month update. After using it for several months, my oil consumption has been drastically reduced. No issues with the unit. Bought the unit through Amazon and shipped quickly and had it the next day. Plugged it in and it worked instantly with my 2009 Tahoe with AFM. I wanted to disable the AFM to prolong the life of the engine due to oil issues related to the bad programming from GM that ends up causing engine failures. Using the current MPG setting, you could see that the engine never went into V4 mode. Engine and transmission was much more responsive and some of the lag associated with the AFM was gone. Shift points seem better and the engine stays in the power band that allows better driveability. I expected a significant hit in gas mileage, but was surprised to see that I'm using more gas per mileage based on a few tanks. 10 miles less per tank for the last 4 tanks. Well worth the investment for just the improvement in driveability. We'll have to wait and see down the road if it prevents damage caused by the AFM system, but I would recommend and buy it again if I was in the same type of vehicle with AFM.

Purchased for a 2008 Tahoe, 5.3, AFM engine with the infamous oil consumption. The vehicle has stayed in V8 mode continuously for about 10,000 miles of driving. I bought in hopes to specifically aid or reduce the oil consumption and it has now been in this vehicle for one year, I have never needed to reset it, it has never drained the battery even when sitting for a week at a time. Oil consumption has slowed down, I was putting 3/4 quart every 5 or 600 miles in this Tahoe and now maybe 1/4 quart in same miles, not great but better and NOT GETTING WORSE which was inevitable if I left the AFM enabled. I also switched this vehicle to Rotella-T6 5w40 Synthetic. Also note, many of the Tahoe/Sierra etc. with the 5.3 have an INACCURATE dipstick marking for full indicator, (the oil level is actually about a half inch over the hashes on the stick when full) google that too! I also have 2016 Sierra with the 5.3, I just bought a second RANGE, this one directly from Range (through Amazon). I have been happy to find that this keeps my truck in V8 all the time and stops all the jerking from coming in and out of V4. I wanted to PREVENT this truck from ever getting into the oil consumption so I put the RANGE in at 9000 miles on the truck. I have experienced zero issue with either device, no resets, no battery drain, nothing. 110% satisfied.

This thing completely fixed my oil consumption issue on my 2008 Avalanche 5.3 liter. I tried the valve cover replacement (redesign) as the dealer and MULTIPLE forums recommended- no difference in oil consumption. After ruining 2 sets of converters, I ran into a forum that mentioned using a programmer to turn off the AFM in my truck. Searched Amazon and found this. Plugged this in and I went from using 2 to 3 quarts between oil changes (4000 miles max) to 1/2 to 3/4 quart. SUPER EXCITED ABOUT THIS! Important notes: 1) it does seem to make a couple my monitors constantly "not ready"....so I need to unplug it about a month before my inspection (it takes 2-3 weeks for my Avalanche to have all the monitors ready). 2) The MPG decreased a little, but not enough for me to care considering the alternative. I lost about 1 mpg. 3) I saw an increase in response time when needing power (such as passing people). I would expect it's because there's no delay when needing the 8 cylinders. All said... this is well worth the money and one of my best buys of the year.

very easy to install, do it with the truck off. not sure it matters but i figure it's just easier on the computer. fantastic throttle response, no more hesitation from v4. no more random shifting back and forth. smoother ride. and YES better fuel mileage not crazy amount but EST. 1-2 ltrs per 100k better. I've been using it on highway and city and I love it. worth the money for sure.

Bueno pero yo no sentí que cambiara mucho el desempeño del motor. Solo que si se aceleró un poco más el motor. Al último termine vendiendo el dispositivo ha alguien que le sirviera más.

I installed an aftermarket exhaust on my 2017 Silverado. When the truck went into 4 cyl mode it sounded terrible. I did some research and found this Range Technology device and ordered it. The unit was easy to install ( just plug it in ) and for the short time I have had it installed my truck has not gone into 4 cyl mode. It looks like it is going to do what it is advertised to do.

It’s been throwing codes in my car, and there’s no way to contact the seller directly, I only get an AI chat that says the seller will email me.

Works great. No more going into 4 cylinder mode. No more vibration. Great response from engine