Easily upgrade the 29-bit LAN factory radio in your GM vehicle with this Radio Replacement Interface by PAC. The LCGM29 is designed for aftermarket radio installation in vehicles without OnStar or for applications where OnStar retention isn’t needed. This radio replacement interface is compatible with both amplified and non-amplified audio systems and includes an onboard buzzer to retain all safety warning chimes. | Pac | | Radio Replacement Interface for Select GM Vehicles without OnStar | Black | Best Buy