I have a 2002 GU III ZD30DI.
I would like opinions on chipping or not chipping this motor.
I will be towing a light weight camper trailer over a long distance but also over a long time.
One workshop said yes, it will be great; another said, No, on that motor it will adjust fuel but not air and that will be bad.

Has / does anyone run this motor with a chip and what do you think?

As a base line I have full NADS, 3 inch exhaust and the truck runs well.
Some hills cause me minor grief and that is what I want to eliminate.

TIA