More than 250 General Motors dealerships across Canada will find out Wednesday that they are being shut down, CP24 has learned from a source inside the company.

The letters were initially supposed to be sent out by the end of the month, but the company will now send them to 264 auto outlets tomorrow instead. The company recently stated that 300 of the country's 700 dealerships were slated for closure.

GM dealers employ about 33,000 people nationwide -- meaning as many as 13,000 jobs could be lost.

Last Friday, GM announced plans to close 1,100 dealers in the United States by late next year.

The company will also close an additional 500 dealerships that market the Saturn, Hummer and Saab brands, which GM plans to phase out or sell.