Brookfield Buick Pontiac GMC Truck is a car dealership in Brookfield, Wis., offering Buick, Pontiac and GMC cars, trucks and SUVs. The various models offered by the company includes Bonneville, GTO, G6, Torrent, Grand Prix, Vibe and Montana by Pontiac, Yukon, Sierra, Savana Cargo, Canyon, Envoy by GMC, and Lucerne, Terraza, LaCrosse, Rainier and Rendezvous by Buick. It provides various financial options and offers to its customers. Brookfield is a Goodwrench service plus dealership that offers services such as oil changes, lifetime parts warranty on certain GM parts, free shuttle service and senior citizen discounts. The dealership is open Monday through Saturday and closed on Sundays..