FLINT, Mich. (AP) _ Negotiations to end two crippling strikes at General Motors Corp. ended Sunday with little progress, a company spokesman said.

Talks between GM and the United Auto Workers were held throughout the holiday weekend and were to continue on Monday, GM spokesman Pete Ternes said.

Since the June 5 UAW strikes at two Flint, Mich., plants, 26 of the company's 29 major assembly plants in North America have been idled. The strikes also have idled nearly 172,000 GM workers.

Sunday's Detriot News reported that half of GM's remaining 850,000 cars and trucks probably will disappear by August if U.S. auto buyers continue their current buying spree.