The CRUX SOCGM-17 is a General Motors Class II Radio Replacement Interface designed to facilitate the installation of an aftermarket radio in select 2000-2013 GM Class II Data Bus vehicles. This interface ensures that essential factory features are retained, providing a seamless upgrade experience without compromising vehicle functionality. It is specifically engineered to maintain crucial safety and warning chimes, including alerts for seat belts, check engine, key in ignition, low fuel, low oil, and lights on.

Beyond chime retention, the SOCGM-17 also preserves the Retained Accessory Power (RAP) feature, which keeps the radio powered for approximately 10 minutes after the ignition is turned off or until a door is opened, mimicking the factory system's behavior. It provides a 12-volt, 10-amp accessory power output for the new aftermarket head unit. The interface is designed for straightforward installation with EIA color-coded wiring.

It is important to note that the CRUX SOCGM-17 is not compatible with Premium BOSE or Y91 audio systems; for such applications, the SOCGM-17C model is recommended. Additionally, this interface does not retain OnStar functionality or steering wheel controls. The module is Micro-B USB updatable, allowing for potential firmware updates. A relay may be required for aftermarket radios that demand more than 3 amps of power.