These trucks had a couple well documented problems. EGR valve got dirty and stuck. Easy delete.
Some had head gasket problems as well.
Having said that, I kept the egr clean on mine, and never had a problem, and that, with a chip, intake and 6" exhaust.

Democracy is not freedom. Democracy is two wolves and a lamb voting on what to eat for lunch. Freedom comes from the recognition of certain rights which may not be taken, not even by a 99% vote.
*Marvin Simkin* L.A. Times (1992)