The automobile industry, led by General Motors and Ford, offered price discounts from June-August that temporarily boosted sales, but these discounts may have masked underlying weakness.
The car makers are always changing prices
( z1 change :ARG0 ( z2 company :ARG0-of ( z3 make :ARG1 ( z4 car ) ) ) :ARG1 ( z5 monetary-quantity :ARG2-of ( z6 price ) ) :time ( z7 always ) )