Family owned and operated since 1965, Hennessy Cadillac provides a friendly, helpful car buying experience while offering great prices and selection. Located in Duluth and serving Atlanta, we are proud to be Georgia’s only exclusive Cadillac dealer! As your Atlanta Cadillac dealer in Duluth, we have a fantastic selection of new and used cars and SUVs. Cadillac CTS, Escalade, SRX at your Alpharetta Cadillac, and Athens Cadillac dealership.