GM OEM L5P Driver Side (L) Engine Mount. GM Original Equipment Engine Mounts bolt your vehicle's engine in place and are designed to function with all surrounding components to help ensure that there is minimal interference with other parts on your vehicle. They are lined with rubber to help reduce engine vibration and are GM-recommended replacements for your vehicle's original components. These original equipment engine mounts have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.