First Post -Newly Purchased 1992 3500 - just turned over to 100,000 miles.
Was smoking a little , put new Air filter in and added some Diesel Extreme Injector additive (after I filled it up) Made a HUGE improvement, no smoke.
Two Questions- Advice on if I can replace filler tube, broke off where it is connected to the block, about a foot up from entry into transmission. Sure hard to get your hands up there. Lastly, Engine sure is a dog, (compared to myold gas 454). Up at 8000 feet altitude.. any performance adjustments?