We recently received our 2003 HD2500, Dura-Max powered shop truck which replaced the 1997 C2500 6.5 Turd-Diesel we had previously. It is, by far a much better truck, but we have noticed a little gray smoke at idle, which turns into a big cloud on initial acceleration from an extended idle session, and then mostly clears up until the next stop light. The truck has 180K, and has been maintained pretty well, but I do not know the full history on it yet, as it was assigned to another location in our company. The truck seems to run fine, and starts good even when cold. We had it scanned, and the scan did not indicate a specific injector as being bad. We cked. the air cleaner for a restriction, and it was fine. I have contacted 2 local dealers as I thought it might have warranty on the injectors being a LB7 engine, but was told the 200K warranty was only for 01's and 02's. What kind of money should I expect to spend on injectors on this thing???