General Motors dealers sold 403,036 new cars and trucks in May in the United States, down 12 percent over last year. But GM’s truck lineup, with overall deliveries up 9 percent and retail deliveries up 13 percent, continued on pace to establish an all-time industry record. In May, GM’s mid-utility vehicles were up 23 percent over last year, and are up 58 percent CYTD. In full-size utility sales, GM sold 37,831 units. For the month of May, GM full-size pickups delivered 76,798 units, and CYTD full-size pickups are up 6 percent.