Financial details of the deal, which is expected to close next year, weren't released. GM spokesman Rob Minton said the agreement could lead to a sale, but more work needs to be done on specifics. Under the deal, Navistar would purchase certain assets, intellectual property and rights to manufacture medium-duty GMC and Chevrolet brand trucks, such as dump trucks, tow trucks and utility trucks. It also includes purchase of the related service parts business, the companies said. Navistar would sell the vehicles and parts for service through GM's dealer network in the U.S. and Canada.