Hi Rich:
The most succinct advice I could give you on your search for a used truck, would be:
-find the best mechanic possible to thoroughly inspect any prospective Dodge, Ford or Chevy full-sized truck, and get him to list everything he discovers (electronic code print-out; any chassis deterioration issues; transmission/engine/transfer case leaks; wheel bearing condition; dash component integrity; etc). And, if your inspection mechanic is really good (ie. a past/present Ford/Dodge/GM trained mechanic), he will list all the components to watch out for for any particular year/model/engine type.
Caveat: every manufacturer's year/model have known issues that are far to numerous to detail. Example: I could tell you about the 11 critical issues you should know about if you were absolutely set on buying a 2004.5 Chevy Silverado 2500HD 4x4 extended cab, Vortec 6 gas engine, with the 2004 tow and plow package (!) in excruciating detail. However, little good it will do you if you were dead set on a 2008 Silverado of precisely the same build (a completely dfferent list of short-comings with that year model).
*we are just back from New Haven, CT; had a wonderful time ;)
S-
