Originally known as the Cadillac Motor Car Division, Cadillac is now a division of US based General Motors. Cadillac has always been one of the more successful luxury brands in the US market. The brand is also one of the oldest brands in the world (founded in 1902) second to the Buick brand. Cadillacs are known for being beautiful, prestige cars. When you have to replace a part or want to upgrade, Cadillac OEM parts are the way to go so that you can guarantee the right fit.