GM, Chrysler saw smaller declines in sales in July. Ford, Subaru, and Hyundai, meanwhile, registered actual sales increases compared with a year ago.
Groups opposed to the decision have until Thursday to appeal it.
Surging demand for cars in rapidly growing nations will mean a robust car industry in 20 years. The US will have a piece of it – though smaller than today – and the models it turns out will be much greener as the iconic industry reinvents itself.
For many of the 41 million Americans who rely on light trucks, new efficiency isn't worth the higher upfront cost.
A sharp drop in demand is driving the industry to pursue a bailout.