Alfred Matthews was founded nearly 70 years ago and is a car dealership selling new and pre-owned Pontiac, GMC and Cadillac vehicles including cars, trucks and sports utility vehicles. The company also offers repair and parts services, insurance services and OnStar and XM Radio products. Alfred Matthews is divided into four departments: Sales, Service, Parts and Collision Center. Alfred Matthews is headquartered in Modesto, Calif., and is open seven days a week.