Located in Portsmouth, N.H., Holloway Buick Pontiac GMC Cadillac is a full-service automobile dealership. It offers new and pre-owned cars, sedans, trucks and sports utility vehicles from Buick, Pontiac, GMC and Cadillac. Its models include the Enclave, Lucerne, LaCrosse, CTS, DTS, SRX, Escalade, Acadia, Canyon, Envoy, Savana, Sierra, Yukon, G8, Vibe and Solstice. The dealership also offers a pre-owned inventory from Chevrolet, Chrysler, Dodge, Ford, Jeep, Lincoln and Mercedes-Benz. Holloway Buick Pontiac GMC Cadillac has a service department that provides oil changing, engine repair, tire rotation, wheel alignment and brake inspection services. Its parts department offers factory-certified parts and accessories. In addition, the dealership provides sales assistance to customers in New Hampshire, Massachusetts and Maine.