Refer to the input text as context and select the correct relationship between 'GMC' and 'DETROIT' from the available options.
Options: distributed by, headquarters location, stock exchange, creator

DETROIT - General Motor's (NYSE: GM) Chevrolet, Buick, GMC and Cadillac brands sold 272,512 vehicles in the United States in July 2015, a 6 percent increase and the four brands' best combined July since 2007.
headquarters location