Good morning. I am looking at doors for a 2005 Peterbilt 379 and am seeing doors with fly windows and doors without a fly window. Does anyone know why some trucks have them and so do not?
Hi EZ, in late 2004, Peterbilt redesigned the door window and eliminated the vent window post, and mirrors moved from the door to the cab( like KW) 2005 also had a flat door window lower ledge Since this was a new thing, and you're truck is indeed a 2005, perhaps you could still get a vent window, but by 2006, they were gone for good. (wikipedia)