General Motors increased sales in Russia by almost 100% in 2007 to 258,835 vehicles, the U.S. company said in a statement. The company credited sales growth in its Opel and Chevrolet lines for the increase, as well as stepped up development of its dealership network. GM`s share of the Russian market has reached 9.6%. GM`s lineup in Russia includes Chevrolet, Opel, Saab, Cadillac and Hummer.