General Motors and its joint ventures sold 173,398 vehicles in China last month but record sales by Shanghai GM and the Buick, Chevrolet and Cadillac brands were offset by an overall 1.8% year on year fall overall.

GM said this was due to the drop in industry sales of commercial vehicles, which impacted its SAIC-GM-Wuling and FAW-GM joint ventures. However, domestic sales of passenger cars from Shanghai GM rose 14.4% to 91,818 units.

Buick sales were up 15.4% to 50,265 units and Chevrolet sales rose 17.1% to 46,154 units.

Cadillac sales rose 76.1% to 2,365 units but SAIC-GM-Wuling volume dropped to 77,944 unitsfrom 90,658 in July 2010. FAW-GM’s sales were 3,353 units, compared to 5,560.

In the first seven months of 2011, GM and its joint ventures sold a record 1,446,901 vehicles in China, up 4.4%.