Brandon Romero

I have a 2015 Chevy Silverado LT with 96,000 miles on it . I’ve been noticing the harsh downshifting as well , I bought a diablo tune and set it to performance 93 while also turning off my AFM . Hoping this will fix all the harsh shifting I’ve been experiencing with the truck . It helped a little but not really . Still get weird shifting from the first 3 gears up and down . I did this only because the dealership told me the truck was supposed to shift like that .. I’m in fear of my trucks tranny taking a dump on me shorty after I lift my truck . Past trucks drove 10x smoother