I left Tuscaloosa at the crack of dawn but only made it to Anderson South Carolina before my beloved truck broke down.   My check engine light came on, followed in about 10 minutes by a lightning bolt icon followed by a message saying exhaust problems, see dealer immediately.   I pulled into a truck stop and they checked the error codes (there were several).   Because my truck is still under warranty I decided to wait till Saturday and take it to a local dealer.   This is where I first ran into problems.   I called 3 dealers before I found one who would even see me before Monday.   I was there first thing Saturday morning and the mechanic on duty said all I needed was a new fuel filter.   He changed it, cleared the codes and told me to drive it up and down the highway to clean out the fuel system.   I did and all the lights/error messages were still there.   I called the mechanic back and he said he really didn’t have the expertise needed, he recommended another dealer with more experi