Midnight TB
Member
I have a 24 6.2 with the active exhaust and running in L9 def disables the AFM or whatever it is called, i can hear it in the exhaust. Truck shifts SOOO much better too, thought I had a bad torque converter but seems it was just the AFM screwing with the smooth acceleration. L9, sport mode and auto start/stop deactivated it becomes the truck it was meant to be.
