September U.S. Light-Vehicle Sales up Slightly on SAAR basis; Q3 Volume Down 1.9%Sales over the past six months have been mostly in negative territory even though inventory continued to rise. Affordability and a slowdown in fleet orders have been the bane to growth. September saw the continuation of gains in the most affordable segments, but it was more than offset by weakness among higher priced vehicles – a theme of the past two quarters.