Review on Qzucar Active Fuel Management (AFM)/Dynamic Fuel Management (DFM) Disabler for V6/V8 GM Vehicles - RA003 by Thong Pilla

This actually turned my 2018 Silverado 5.3 V8 into a V8! Buy and don't worry and don't wait. Once you've checked them out, just get this. It's amazing when you step on that pedal, and there's no lag when going from 4-cylinder to V8, and no awkward toggling back and forth. That alone costs money were it not for the savings per gallon, but it is there. I get 1-4 mpg better depending on how I drive and even saw 6 mpg better on one ride I did. It works as it should and is very easy to install in a truck. I installed it a few weeks before a big trip to make sure it wouldn't mess up the motor and gave a code but never had a problem. I have better mileage now because my truck doesn't look for 4 cylinders to save 2 seconds of gas and then there is a 5 second delay to give me the power of my V8 back. I notice that my truck seems to shift later when exiting a stop sign and give in a bit, especially when towing my boat when it wasn't before. The only thing I'm worried about is that I've noticed that after a bit of movement my truck will coast, it doesn't seem rough but not quite right and it seems to me that it's going to idle too low and switch off. It never turned off but still scares me when I see it happen every time. Overall I would recommend buying it works great and is half the price of the Range brand. One thing that really bothers me but that's because I'm weird but there are 4 lights on this one and I can't figure out why sometimes 3 are blue and sometimes it will be but only 1. I have never seen that all 4 light up at the same time. This nonsense gets on my nerves here too, but this in no way affects the 100% recommendation of the product.