High Pressure Fuel Pump
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
The high pressure fuel pump is a mechanical pump. The high pressure fuel pump is located on the lower left side of the engine. The high pressure fuel pumps provides high pressure fuel to the fuel rail at a specified pressure regulated by the fuel pressure regulators.