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Tuesday we tried to checking the EGR valve and solenoid. The EGR Valve was definitly bad, it failed to hold a vacuum. Replaced that, still didn't fix the problem.
Decided it was time to bite the bullet and go after the lower intake gasket. It was horrible looking. Scraped it all off, popped a new gasket on, put it all back together and it ran like a champ. LIKE A CHAMP! Reset the codes and its still running as good as I can hope for.
pawpaw thanks again for your help and advice. I'll be back here next time the truck needs something, I just hope its no time soon.
OK, good feedback. Way to hang in there & be persistant on your drill down trouble shoot & be willing to dig deeper when things didn't completely straighten up & find that root cause & put the fix on it!!!!!.