I would not be averse to deleting the DPF after proper investigation and maybe running the car solely “off road”. but my preference is that GM gladly provide free DPFs and DEF/DPF/sensor/software repairs for the life of the car and/or myself, for at least 100k miles on the car and 100 years for me.
It’s throwing an OBD code now, probably DPF-related. I doubt it is either “DEF cap loose” or “Diesel cap loose”. :/