Newer diesel with least problems

Concerns about DEF systems are often misguided, I know mine were. The rig in my sig line has been trouble free and the tail pipe at 88,000 miles is about as clean now as it was when new. One pet peeve is the tank level that only reads “OK” until it drops to about 30%, then a warning indicates that you have approximately 600-800 miles left before the dreaded downgraded performance kicks in. Hopefully GM has addressed this on newer models. Never been a problem, just carry a 2.5 gal box of DEF if traveling off the grid (not near an auto parts store or Walmart) to keep you going. Another peeve is the DRW model in 2013 did not have an oem TPMS. Aftermarket are ok, but I’d much prefer a factory system. Our 3500 has been bullet proof, tons of power to pull our 2.5 ton AF up hills, cruise control coupled with the exhaust brake make traveling in the mountains a breeze. Very happy with our diesel and never say never, but I’m never going back to a gas rig if hauling a TC.