Range Technology RA003B AFM/DFM Disabler-Blue

After reading numerous reviews on this and other items advertised to give similar results. I am not sure of the others but results were immediately noticed in shifting and power on this 2014 GMC Sierra with 130k miles. I am curious what the gas mileage results will be but it too early to tell. I don't consider it expensive after spending almost a hundred dollars to get my AC to function in our current heat wave. Both are money well spent,

so far so good ! i have a 2017 GMC Sierra with 73k miles, and only wish i had installed this sooner ! If you have been thinking about getting one , stop and just get one . I can feel not only better throttle response, but easier shifting, and overall smoothness. I don't know about fuel consumption changes, but really , i don't care , it's totally worth it ! I chose Range after doing research and felt i would have peace of mind with this top of the line item !

I feel like it works well good build quality functionality is great so far wish I knew about the Holly version. They have a version where they could upgrade it every time it needs new software update even though it cost an extra hundred dollars I believe it’s worth it for peace of mind and they also give you a warranty for your truck in case the AFM breaks your engine somehow but anyways. As far as value, there’s plenty of cheaper ones, but I wanted this one for a piece of mind because I had the most info on it so I went with this one as opposed to a cheaper one.

Before using the product: the auto stop is very annoying, the car has V8 power but under 40mph the power is worse than V6, like you are a lion but meow like a kitten 😂.After using it You will clearly see the difference, the annoying auto stop mode is turned off, your car is back to V8 power, the fuel before and after using the product is no different, the car battery is not drained because I tested and parked the car for a week while still plugged in.In short, you should try it, amazon gives 30 days to return it and I think you will definitely keep it. Note: remember to go to the product website to check the product code that matches your car, leave a message and they will reply within 24 hours (this is how I did it)

Received the item in a previously opened box. No documentation. The device was not secure in the "slot" inside the box, but flopping around loose. It appears to be a used device. For almost 200.00 I am very much disappointed.I'm very apprehensive about plugging this thing into my system.Update :I took the chance and plugged the device into my 2017 Chevy Silverado. Thus far it is working as advertised. As a matter of fact, it appears that my gas mileage is actually better than what is was using the stock flex technology V8/V4. Running as a V8 consistently (which is what I want) has worked out better than what I expected, and the issue or "possibility" of the lifters sticking over time with the garbage flex technology is not a concern any longer.So I bumped up to 4 stars. The opened box and no documentation is still an unacceptable problem and I would hope that the seller will address it.

Highly recommended from GM tech especially with newer 5.3 engines with variable displacement operationSays that there is an abundance of repairs to cams lifters etc.

Been about a month now the truck 13 gmc 1500 5.3 runs better and mpg is the same. No more surging.

Works great and buys me time until I actually have the fuel management parts removed from the motor. Instantly effective and idiot proof.