After two straight record-breaking years of 17.5 million units in 2015 and 17.6 million units in 2016, car sales are retrenching. Prior to July, car sales had declined in four of the last five months, but improved to a seasonally adjusted annualized rate of 16.7 million in July, up from 16.5 million in June. While auto sales may well be bottoming out, they will not boost GDP in 2017.