This secondary air injection pump is designed to match the fit and function of the original pump on specified applications. Made of quality materials, it is engineered for reliable performance and durability. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Buick Lucerne: 2006, 2007, 2008, 2009, 2010, 2011] - [Cadillac DTS: 2006, 2007, 2008, 2009, 2010, 2011]