General Motors Co. (NYSE: GM) dealers delivered 272,423 vehicles in the United States in August, led by an 18 percent increase in truck sales compared to a year ago, a 10 percent increase in GMC deliveries and a 30 percent increase in commercial sales.

Total deliveries were down 1 percent compared with last August, which was GM’s best sales month of 2013. Retail deliveries, which are sales to individual consumers, declined 4 percent. Fleet deliveries were up 9 percent compared with a year ago.

On a selling day adjusted basis, GM’s total sales were up 2 percent, with retail sales essentially equal to a year ago and fleet up 13 percent.

Incentive spending as a percentage of average transaction prices (ATPs) was 10.4 percent, the lowest of all domestic automakers by a significant margin, according to J.D. Power PIN estimates. GM spending was down a full percentage point compared with both August 2013 and July 2014.

“Chevrolet, GMC and Cadillac had an outstanding month with trucks. Cars and crossovers like the Buick Encore and GMC Acadia, and the Chevrolet Sonic, Cruze and Traverse, were also strong,” said Kurt McNeil, U.S. vice president of Sales Operations. “We see a strong fall selling season ahead for GM and the industry, which sets the stage for the launches of the Chevrolet Colorado and GMC Canyon. Car-buying fundamentals like employment and energy prices are in good shape, consumer confidence has reached a post-recession high and business investment is increasing.”

Nearly 28,000 dealer orders have been placed for the Chevrolet Colorado, along with 14,000 orders for the GMC Canyon, which both began production this week and arrive in showrooms this fall. Chevrolet and GMC will soon be the only brands offering mid-size pickups, as well as light- and heavy-duty full-size pickups.

Light vehicle sales for the year are now expected to be near the high-end of GM’s full-year outlook set in January, which was for 16.0 million – 16.5 million units.