- Retains OnStar® when the factory radio is replaced
- Retains Bose amplified audio system
- Retains all safety warning chimes
- Includes chime module
The OS-311 radio replacement interface is your solution to upgrade your factory radio with an aftermarket radio in select GM vehicles. OS-311 works with your vehicle's databus system to retain OnStar, the Bose amplified audio system, and all safety warning chimes.