Fit For Buick Fit For Cadillac Turbocharger Solenoid Valve turbocharger. OEM NO. : 55499323. Function, The function of turbocharger solenoid valve is to control the boost pressure by overcoming the spring pressure and separating the exhaust flow. Function: This turbo actuator solenoid valve adjusts boost pressure through resisting spring pressure and redirecting exhaust flow. Direct Replacement: Designed for direct fit replacement, it can be installed swiftly with no intricate steps, offering easy assembly and application to efficiently save your energy and installation time., Manufacturer: CQJJXKYC