Yeah ok thanks to all the guys that have been thru all these problems due to the AFM. I BOUGHT MY FIRST NEWER TRUCK LAST YEAR 2015 Chevy Silverado 5.3 4x4. And as soon as I made it final on the truck that it didn't seem right the way it drove. The God damn AFM literally is going in and out of 4 cylinders , doesnt matter what speed I'm going. And then when I get back on the gas, it's like the transmission doesnt know what gear it wants to go in. And either shift way down or way high. And when its going in and out of 4 cylinders it drives very laggy! Its seriously Its driving me absolutely crazy. Truck only has 46000miles on it. And think God I read this stuff cause I went to a mechanic that wasn't a Chevy dealer because first time I took to Chevy told them to look and check it out the afm. They wouldn't drive it or acknowledge what i told them that there was a problem. So thank God it's under warranty. Cause mechanic I talked to said he's done 100s of lifters on these shitty chevys with afm