Analysts estimate the pace of sales increased to an annualized pace of 16.1 million in May from 15.98 million in April.
"Industry surveys point to a modest gain in overall motor vehicle sales in May after they pulled back 2% in April to a 16.0 million unit annual rate following a 7% surge in March to a seven-year high of 16.3 million," said Morgan Stanley's Ted Wieseman. "Retail sales appear to be on pace for a stronger gain to the best pace of the year, partly offset by lower fleet sales."