The after-market replacement cowl panels are not made with a vent. It is possible your cowl has been replaced.
Ok thanks, i figured it might have got shaved off at some point and time thats why i was wondering if it was saposed to be on he 1949 suburbans or not? and does anyone else have this hose coming out of their gas tank? if so is it correct and or does anybody know whats its for? i saw a used gas tank on ebay that guys said his had it too??
gas tank pic
http://i89.photobucket.com/albums/k237/bigtony55/IMAG0169.jpg