ACDelco Gold (Professional) Suspension Control Arms are a high quality alternative to Original Equipment (OE) parts. These suspension control arms connect your vehicle's steering knuckle to its frame and allow the suspension to move. This keeps the vertical motion of your vehicle's wheels synchronized in relation to its body. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.