I'm posting this just as a FYI for those that want to deactivate their AFM and/or NPP function. I have a 2015 z51 M7 with some mods, Halltech carbon cai, Borla catless x-pipe, the secondary cats are gone, ARH mid length headers and a B&B bullet exhaust. The NPP was deleted via removal of fuse #42 and the B&B is not equipped for the NPP valves, so I removed the actuators. The car was tuned at DaSilva's and the function of the 1-4 skip shift and the AFM valves was tuned out, so neither are functional. I wanted to remove the AFM actuators but was told that it would cause the CEL to come on. I purchased 2 small resistors, from a vendor on another forum and plugged them into the AFM wiring harness. The whole process took about 1 minute and then I removed the AFM actuators. No CEL, car runs great, and the sound is awesome.