Mitchy21

So after I wrote this, I went on a 600 mile road trip. Filled it with premium just to see what would happen and didn't feel a thing. Haven't ran premium since and still don't feel anything. Doesn't really make sense that premium would help the situation, but I have about 1200 miles on it since getting back from that trip and I haven't noticed that it does it at all anymore.

Nevermind...just found an article that lists the models that kept the DFM. LT Trailboss is one of them. There's no way this is how the truck is supposed to drive. It's annoying the hell out of me. Almost like the cylinder management is over managing and activating/deactivating cylinders so frequently that the truck gets a slight stutter.

Hmm...I assumed I didn't have DFM on mine due to chip shortage. I didn't get the auto start/stop. I'll have to check the sticker in the morning. Is there anyway to check that other than the sticker that you know of?

I feel like I'm going crazy when I drive mine. 2021 5.3 Trail Boss, build date 7/21, 1,700 miles, bought just over a month ago. I swear I feel constant misfires when holding speed on the highway or going up a long slight grade. It's not pronounced at all, I don't think a passenger would even notice, almost just feels like tiny constant bumps in the road. Maybe all in my head from reading this forum too much? RPMs between 1100 and 1400. I drive the same roads every day, and I swear I didn't feel this for the first 1,500 miles. Not sure if it's misfires, or if the truck is going into 10th gear when it really shouldn't be and bogging down?