You think DC would have addressed this already. My 03 CTD takes for forever to warm up - longer even than my 94 did and it's not even below freezing yet! Had a 00 PSD and it had an exhaust divertor that went on automatically when temps were below 35 or so - improved warmup time greatly. Not sure if I buy into the excuse that all that steel needs time to get hot, as it cools off pretty darn fast on a cool day. If I make a bunch of short stops, turning het off for 30 minutes each time she never gets up to operating temp. Since it's auto no exhaust brake option. Is there any other cure for this?