Congrats on keeping this long. So, giving you think you can get 9k out of your truck that translate into you needing 10-12k for the Dmax. Body repairs on yours (I have no clue what yours needs) but go high and say 3500. Knock sensors, just did those last weekend (2.5 hrs and 140 for AC Delco harness/sensors. Seat heat, sounds like you don't need it anyways lol like mine it can stay out. Dash cluster, guy in TX that does work for dealers will convert yours into the escalade platinum with trans temp and led bulbs for 200 I think.. Quality work. 4wd selector when it goes is simple soldering job. Steering wheel controls burnt out? Again simple soldering job. Basically, you know exactly what's wrong with YOUR truck.. Diesels are nice, I wanted one bad. My motor went out in my 04 crew slt 4x4... Lq9 swap and l love it. Can't wait for my 4l60 to dump so I can stall /build it or buy from finish line, etc.... A pro charger would be cheaper than a diesel and since you don't tow.... Just keep your boring truck and fix it. That's the true meaning of truck love.. Making and keeping them the way you desire them to be! Good luck