Under the deal, GM will send 5,000 of the SUVs to China each year, boosting the automaker's presence in the world's fastest-growing vehicle market. GM is the market leader in China and sold 876,747 vehicles there in 2006.

The vehicles will be imported by GM's local partner, Shanghai-based SAIC Motor Corp., and sold through its network of nearly 400 Buick dealerships in China.

The Enclave, a luxury crossover SUV which debuted this year, is built at GM's Delta Township assembly plant near Lansing, Mich.

Meanwhile, hundreds of United Auto Workers walked off the job Monday at the Delta Township plant as the union called a nationwide strike against GM.

In May, GM signed a deal to export $700 million worth of Cadillacs and automotive components to China from the U.S. The Detroit-based automaker said its China operations already have imported about $3.5 billion worth of vehicles, components, equipment and machinery from North America during the past decade.