Truck is a 2012 Sierra
5.3 engine
CAI/Shorty headers/NO cats/full 2.5" exhaust true duals xpipe
3:73 Gears 33" tires
6l80E trans
I have been watching and studying for a while now, I have done what I can in my limited experience.
Any help would be greatly appreciated, I'm not afraid to learn really just need pointed in the right direction
Thanks
new.hpt