Employee discounts for everyone lost their luster in Canada for General Motors and Ford Motor Co. last month.
Sales of both companies failed to keep pace with the overall market's increase of 7.5 percent in August compared with August 2004.
General Motors' sales, including Saab, dropped 3.8 percent in August. Ford Motor's sales, including its import brands, rose 3.0 percent.
In July, both carmakers' sales jumped more than 27 percent with the introduction of employee pricing plans.
The Chrysler group was the lone Detroit automaker to maintain strong sales in August. The group's sales rose 23.3 percent last month.
Honda and Acura sold the most vehicles among Japanese carmakers, rising a combined 8.3 percent. Toyota and Lexus were up 9.6 percent. Nissan and Infiniti rose 31.7 percent, and Mazda was up 17.9 percent.
GM remained the No. 1 automaker in Canada, selling 319,446 vehicles through the first eight months of 2005, a 5.9 percent increase.
DaimlerChrysler was second with 165,426, slightly ahead of Ford Motor's 162,151. Toyota, including Lexus, follows with 119,873.