I bought this 2008 used from a dealer.

Well I crawled under the truck to look at the DPF, but there’s a pipe in its place.

The weird thing is the EGR valve is still plugged in under the hood.

So I don’t know if there are tunes currently installed on the truck.

Is there anyway for me to know exactly if there are?

I’m assuming they just did something to the ECM for it to take out the use of the DPF.

I don’t want to purchase an “off-road” device for it to brick the ECM not work.