[CamarosRus]

I've been told by the CUMMINS customer advocate at Chrysler that the 03-04 1/2 was the sweet spot engine for the 5.9

"The reason to avoid a 2004 5.9 DODGE made after Jan 1, 2004 is because of the changes made to the injection system and how it's used to meet the tightened NOx regulations that came in with the start of 2004 calendar year.
2004.5 trucks run higher rail pressure and fire the injectors up to 4 times to reduce in-cylinder combustion temps.........this leads to stress on the injectors and is just inefficient combustion. Diesels dont like to have combustion temperature artifically controlled - it goes counter to their nature and makes them less effecient overall.

I'm still shopping and cant deny the cosmetic appeal and comfort of the GMC Sierra SLT ........