Range Technology RA003B AFM/DFM Disabler-Blue

So easy to install. I found that my 09 Chevy Silverado pickup with the 5.3 motor runs more smoothly with this afm disabler. No hesitation and just runs like a V-8 should. I had heard that you might get 1or 2 miles to the gallon lower but I checked my mpg and I don't think it changed from after installing this afm disabler. Well worth the money and I haven't had a bit of problems with it. Just drive right and change your oil and your motor should last a long time. Buy this one and not the cheap ones to save you money. The old saying is you get what you pay for!

No more AFM crap! This completely takes care of the awkward transmission shifts, clunks in the driveshaft when AFM activates, and gives some peace of mind that the cam phasers aren’t going to malfunction in 4 cylinder mode. And this is a lot cheaper than a full camshaft replacement and AFM delete! I’m also getting about 2 more mpg.

Purchased this Range Technology AFM disabler for a Tahoe with 5.3L V8. My Tahoe would drop into the 4 Cylinder mode often, very annoying. I have never gotten used to the hesitation when the engine shifts back into the V8 mode in response to my attempt to accelerate, especially from a dead stop. When driving in normal traffic situations the 5.3L FMS constantly put the engine in and out of V8 to V4 and back distracting from the driving experience. Freeway driving was another area where the 5.3L FMS would drop the engine into V4 when my foot came off the pedal or while coasting which is especially annoying while towing a 6500 lbs. RV or when attempting to pass another vehicle. Installing the Range Technology Disabler has solved these problems and I have noticed the vehicle drives much smother. Yes, it cost more than the knockoffs, but I believe it's worth it. My first AFM disabler was a top-rated knockoff brand, cheaper for sure, but I found it didn't work as I thought it should have, it kept the Tahoe's 5.3L in V8 mode but something was missing, it wasn't smooth running like I experience with Range Technology FMS disabler also there was no way to see the lights on the disabler as they were partially covered with the wrap. Remember the old saying "You Only Get What You Pay For" applies here. I am pleasantly surprised with the build quality, ease of installation and the function of the Range Technology device. Only thing I don't like, nothing in the instructions give you a clear understanding of what ALL the light functions indicates but you can go to Range Technology's web site. Also, I have had no issues with the truck's battery SOC and I have seen a slight increase in fuel economy. I do recommend this device.

I’ve had this installed for I think a couple of months now and I’ve had no problems. The vehicle stays in V8 mode when the item is plugged in. I do unplug the item and take it inside with me for overnight or one I’m not gonna be using my truck for a few days because of the parasitic draw.

For those wondering if it works in the 21 camaro with a 10 speed auto? Yes it does. Yes you can use your remote start. No it does not throw any codes. Do you want to spend the 239 bucks on it? Yes you do. Does my car get less gas mileage? Actually the opposite. With afm on i was getting 22 mpg and with this plugged in I get 21.8 which might also be because my right foot is heavier than the left. How easy is it to install? Takes longer to open the box from amazon. Littereally plug it in and you're done. Go enjoy all of that 6.2l's of fun all the time. No more waiting for the engine to fire off all 8 anymore while the Honda gets the jump on you. I have no clue about battery drain. Since I drive the car daily. Thanks gm for giving us all engines the kill half the cylinders for no good reason. But thank you range for making this so we can have them all back. I paid for a v8 now I can use it the way its meant to be.

Let me tell you something: if you don’t have one of these Range Technology part #RA003B, you are not in the game. WOW, what a game changer! My 21 Chevy Trail Boss Z71 sounds and feels a lot better than before. I’ve bought a lot of stuff from Amazon, and this is the first time I leave a review on an item. The thing is worth every penny. I have a Super10 Flowmaster, and it sounds amazing—not irritable sound when you stop or shift, pure V8. Again, get you one, spend a few more dollars, and get you a quality brand that’s going to make a difference.

I've had this for a couple of months now in my 2020 sierra 6.2 10 speed. It seems to take about 5 minutes to disable the dfm if I'm at lower speeds like 30 mph but if I get straight to highway speed it works immediately and once it cuts the dfm out it stays off until the next start up. The auto start is disabled and I haven't had any problems with it. I drive my truck every day so I don't have any problems with the battery being drained. Overall I'm happy I just wish it cut the dfm out immediately every time.

Did exactly what it said it does. Easy hook up too. Awesome! I noticed the difference in my truck right away.

2022 Silverado pre-refresh, RPO codes L84 (5.3L V8) and MQE (8-speed transmission). Pre-refresh means Global A architecture and compatibility with the Range RA003, whereas trucks after that ("2022.5" and after) have Global B architecture and require the RA007. Range Pulsar LT can be used on just about any but it's more expensive. Lots of youtube content on all these devices. What a difference. It's like a different truck. Even in L7, which is supposed to disable DFM, the drive was clunky. Much nicer with this device, and the auto-stop is fully disabled with it installed regardless of the dash button. GM removed the display to show which cylinder mode you are in but based on the improved drive and the auto-stop, it certainly seems to be working and worth the money. I did also buy an OBD2 splitter so I can use a reader at the same time, and so that if I unplug this RA003 frequently I am not wearing out the factory connection.

Cumple con lo que promete, mejora el funcionamiento. El paquete llegó abierto sin embargo funciona, solo tengo dudas, no especifican si tiene garantía

Works as intended, using it in a 2018 Camaro SS

I am in Australia. Ordered through Amazon. I read as many reviews I could find. Used in the Chev 1500 Silverado for a week or so and found it to be as advertised. Can't fault it at this time.

Menciona que evitará que el motor del vehículo se pare en los altos, pero continúa apagándose, no sé si la verdad funciona o no, no veo ningún cambio en el ruido del motor, o no sirve, o está defectuoso o no es compatible, lo usaré un tiempo y si no veo ningún beneficio lo regresaré