New to forum and a new 2500hd AT4

pinebaron · Jun 24, 2026

Prevostart said:
I did notice yesterday from 70 MPH down hill on off ramp I hit brakes a couple of times and I think I heard or felt a slow down, So when you just hit the brakes it applies more exhaust braking, I'm really trying hard not to hit brakes to hard because of the new front Rotors and Pads for at least a couple of hundred miles, OEM Rotors were warped from 1st owner.

I find exhaust brake on my truck is inversely proportional to speed and not quite like a Jake Brake (which I have no experience of) and in 'my experience', works even more effectively on steeper gradients.

Prevostart · Jun 29, 2026

I looked in the Manual about turning off the auto door locks, When you start engine and put it into gear doors lock, Then when you put into park doors unlock, Manual says you can disable it but no luck, No big deal will just get use to it.

Koolbreezeya · Jun 29, 2026

Welcome

gemarsh · Jun 29, 2026

Prevostart said:
I looked in the Manual about turning off the auto door locks, When you start engine and put it into gear doors lock, Then when you put into park doors unlock, Manual says you can disable it but no luck, No big deal will just get use to it.

Post a screenshot. I haven't heard of that process since the the 2007 model.