Fuel Rail Pressure Regulator Sensor 12635273 5PP11-4, Fuel Injection Pressure Sensor for Cadillac SRX, Chevrolet Equinox Impala, GMC Terrain, Buick Lacrosse Regal Malibu 10-17 2.4L. Easy to Install: This fuel injection fuel rail pressure regulator sensor adopts a standard connection interface design, which is easy to install and can be efficiently completed using only daily maintenance tools.