Unfortunately it's a yes on the DPF and virtually impossible to delete as the ECU programming is locked down by a vehicle specific PIN that only a dealer can get from GM.I like very much. Now to win lotto and hook it up to a Zone
With that power, low range and locking rear, I doubt much would stop the beast, except as you say, its size. Reckon it would be bellying out on top of some of those Simmo dunes.
Guessing it has a DPF? Where is it situated?
The good news is that the DPF is up high between the chassis rails, so hard to damage.
We are getting a new van in March/April with a 4.5t ATM - hence the need for the GMC.