Steve
I'll br anxious to know if you think your new 07 is quieter than your 03. I'm just thinking maybe there has been some improvements. We didn't hear the trains except when outside at Flagstaff or Williams and we were close but not right next to the tracks.
Happy trails...........................
Sue and Ed Rowe
Hemet California
2005 3400RL
2006 GMC 3500 Dually, D/A, Crew Cab, Long Bed