General Motors dealers in the United States delivered 326,300 vehicles in June, down 24 percent, compared with year-ago monthly sales, the company reports.

The decline was partly attributed to a planned reduction of an additional 13,487 daily rental sale vehicles in the month. GM now has taken more than 92,000 daily rental vehicles out of the sales totals in 2007.

“Given the planned reduction in daily rental sales, we expected June would be a tough comparison to a year ago. Our retail performance for the month was also below the solid running rate we’ve experienced for the first half of the year which we attribute to a soft industry and lower incentive spending than our competitors. However, we continue to believe that maintaining a disciplined approach to both incentives and daily rental car sales is key to making our marketing strategy work in the long run,” said Mark LaNeve, vice president, GM North American Sales, Service and Marketing.