Buffalo have mirrors in same place as pre buffalo.Chessie -
IBME that the different shape of the OEM mirror arm and mirror head of a Buffalo somehow didn't get as mucked up as the older GM hiway models did when running in the rain. (Let alone an MCI 7, 8 or 9!)
Dunno why, perhaps due to a different airflow pattern around them? Perhaps because the driver sits lower in a Buffalo, thus the mirrors are lower, thus changing the way front wheel muck is thrown at them? Perhaps because of the larger rubber fender skirts on a Buffalo's front wheels? I just don't know.
But I do remember not having to reach thru the toll window to wipe them off as often as I did for the others.
FWIW & HTH. . .