Alamo and National share a fleet of cars. When renting from National, we usually have picked a Dodge Grand Caravan because that's what we drove at home. There were also Pontiac Montanas if I recall. I rented my last minivan in December 2004 so I can't tell you if Chevy is what they exclusively use now. But it seems to me that they have several different car makes available. You may or may not get the Chevy Uplander. It says on the rental agreement "or similar".