Works as it should, but I'm like everyone else. I'd like to know the meaning of the 4 lights

When shopping for an AFM/DFM disabler, I was skeptical to buy this product because of how cheap it looked and because it was a lesser known product than the Range Technologies product. For my truck I always want the best, but $250 for a little plastic box with a tiny circuit board inside? No way. These products are likely manufactured at $12 per unit.

This product works exactly as intended. My truck now runs on 8 cylinders all the time - no B.S. involved. I even get about 1mpg better fuel economy without the AFM technology. I don't really care about the blue LEDs on the module itself because you can't see it unless you're looking for it. I highly recommend saving some money and buying this product over the Range product.

I guess I'm one of the lucky ones. I purchased my Sierra new in 2007. I knew nothing about AFM and didn't even know I had it for years until my brother in law told me and explained what it is. I never had a problem with it. I couldn't ever tell when it went in to 4cyl mode. It didn't shudder. It did nothing abnormal. I would have never known. Anyhow it's 16 years old now and I have over 162,000 on it. I started to get concerned after reading how a bad AFM system can grenade your engine. So I purchased this little disabler just to be safe. I still can't tell any difference since it's plugged in. It has four LEDs as you know. I wish there were something in the box to tell me which lights should be on when I'm going down the road. I have three out of four on. If someone knows leave a comment. Simple to install in case someone is wondering. Just plug it in under your dash below the steering wheel. There's a port there that's clearly visible.

I was skeptical about it, my GMC Sierra 2013 SLE truck been running ruff, shifts all weird and kicks suddenly when shifting sometimes and truck seems to have no power. I should have bought it long ago, listen to me buy it now, don't wait. I put it in the OBD2 port and it just works, my truck has all the power, feels like a true V8, I almost spun out since I'm used to gasing it to go uphill. GM needs to ashamed of themselves for putting AFM garbage. My truck feels brand new. 100% satisfied.

My 2014 1500 Denali 5.3 6 speed ran pretty bad. I was ready to shoot it and put it out of its misery. It always shifted to early and you had to put your foot in it to keep up with a Yugo. Anyways after driving in m5 for about 3 months i decided to give this thing a try.
First 30 seconds down the road i hit the jackpot. Everything started coming together. It shifts correctly, it has power, it sounds better and bet i get better gas milage because i have not had to downshift to drive up a slight elevation.
Highly recommend, no joke.