Cavender Buick GMC North. The Cavender Family has been selling and servicing automobiles and trucks in San Antonio and South Texas for over 65 years. James M. Cavender Jr. started Cavender Oldsmobile in 1939. Over the next 30 years, Cavender Oldsmobile would become one of the top Olds dealerships in the country based on sales and customer satisfaction. With the help of his twin sons, Jimmy and Billy, James Cavender would acquire a Cadillac dealership in 1979 and a Toyota dealership in 1985. By the mid 1980’s the third generation of Cavender boys would enter the automobile business. Today the Cavender name is associated with 9 separate dealership facilities selling Audi, Buick, Cadillac, Chevrolet, GMC, Land Rover, Scion, and Toyota brands. The slogan “Where the name Cavender on the door, there is a Cavender on the floor.” certainly applies today. Each Cavender acts as not only the dealer, but general manager, and is always available to meet with customers and employees. When you buy from a Cavender dealership you are treated like family.