This fuel pressure regulator is engineered to match the function of the original equipment regulator on specified vehicles. It is engineered to help ensure proper fuel injection pressure when the original regulator has failed or is malfunctioning. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet Express 2500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Express 3500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Express 4500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Silverado 2500 HD: 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Silverado 3500 HD: 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Savana 2500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Savana 3500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Savana 4500: 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Sierra 2500 HD: 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Sierra 3500 HD: 2011, 2012, 2013, 2014, 2015, 2016]