I've had the 1st generation 3.0 in a truck since early 2020 and I really have enjoyed it. Heaviest I towed was bringing my tractor home on a bumper pull car hauler - about 7k combined for 120+ miles. Towed like a dream and had plenty of power to do lane changes and accelerations up hills and out of corners. i averaged about 16mpg on the trip home. Empty I consistently got 30+ on the original tires when commuting.I want one of these as my daily driver, too. Heard a few bad things, but I loved my previous gas Tahoe. Couldn’t imagine how nice with a baby Dmax….
Only hiccup in 4+ years was a code for a glow plug communication error. it went away in a couple restarts and never came back. I eventually had it in and the dealer flashed it and they said there was an update in there that could have been related to the code. My only issue has been the operator and mechanic. I have put it into limp mode twice - once for front brakes, and once for rear brakes. After doing it 100+ times I thought I was capable, but apparently I was wrong. You need to put the new ones into service mode before doing anything or it thinks it's broken. not a diesel issue, just a me issue.
Overall I couldn't be happier with it. I do plan on trading it sometime after the new year - ideally for the same thing. I'm gaining fast on the 100k mark, and I just don't want to play the repair cost lottery. I have no illusions that a modern emissions restricted diesel will be a lifetime of issue-free ownership.