The nation's largest automakers — mostly — reported declining sales last month, which at least one company attributed to a month that included one less weekend than August 2015.
General Motors and Ford saw their sales numbers decline by 5 percent and 8 percent, respectively, between August 2015 and August 2016.
Among GM's brands, Cadillac sales remained flat while Chevrolet fell by less than 3 percent; the GMC and Buick brands, however, each declined by more than 12 percent.
Ford vehicles, meanwhile, fell by 9 percent, which more than made up for a 7 percent increase in its Lincoln luxury brand.
Their "Big Three" rival Fiat Chrysler, however, reported 3 percent higher sales last month -- the only automaker among the six largest in the U.S. market to report an increase.
Jeep maintained a strong 2016 with 12 percent sales growth, while Dodge and Ram trucks also increased last month. The flagship Chrysler and Fiat brands fell by more than 20 percent.
Those six companies comprised more than 75 percent of the U.S. auto market in July, according to statistics from The Wall Street Journal.