Zeigler Automotive Group today announced the official acquisition of its first Buick GMC Cadillac dealership, making Grossinger AutoPlex its 24th retail location to date. The nearly 60,000-sq. ft. dealership at 6900 N. McCormick Blvd. in Lincolnwood, IL will be renovated and rebranded to Zeigler Buick GMC Cadillac.