i would definetly make them fix it right. if a seal or gasket isn't put in right, or surfaces aren't clean, it won't seal. i'd talk to other dealers and make sure they will work on your pickup before you tell these guys what's up.
__________________
07 6.7 cummins, 6 speed, one-ton, electric blue, gauges, afe intake, MP-8/Superchip, 4" BADP TB, egr delete, edge w/attitude
Give him books and give him books, and all he does is eat the pages
I.B.E.W. local 57 America is Union