Review on Qzucar Device Disablement for Active Management by Michael Wehrman

After reading all the horror stories about collapsing hydraulic lifters and premature engine overhauls due to the Chevy AFM system, I decided to use a bypass widget. Installed after disconnecting the negative battery cable, then started the engine (2018 Chevy Silverado 1500 with 5.3 liters and 24,000 miles). The unit worked as advertised and I never had a V4 drip during a 450 mile round trip with a small closed cargo trailer carrying about a ton of weight. Mileage dropped from 22mpg to 13mpg on the freeway, but all because of the brick-shaped trailer's poor aerodynamics. There were also some quirky prompts on the dash: roll the driver's window all the way down, then fully raise, open and close the driver's side door. I liked the quicker response when pulling off lights and red lights, and getting the truck out of that uncomfortable hovering feeling when switching from 8-cyl. for 4-cyl. More accurate shifting too.