NHTSA Complaint #11527126 — 2016 GMC SIERRA 1500

2016 gmc sierra 1500 with a 5.3 v8. Dropped a lifter on cylinder one at 79k miles due to the active fuel management known as AFM and Causing the truck to misfire and shake so bad that the truck turned its self off going up hill on a busy highway at 60 mph causing me to have no brakes nor steering and tried turning the truck back on for brakes and steering and it wouldn’t turn over and just crank. Then got it to crank took it home then took it to the dealership the next day which was 5/30/2023 it was at dealership and they fixed after a week of being in the shop from 5/30/2023 to 6/14/2023 the same day I dropped a lifter on cylinder 7 aswell 2 hours after leaving the dealership causing the truck run even rougher and misfiring.