PAC OS-5 29-Bit GMLAN Radio Replacement Interface – Retain OnStar & BOSE For Select GM

Upgrading the stereo in your GM vehicle with the 29-bit GMLAN system?

You need the PAC OS-5.

This interface lets you swap in an aftermarket radio while keeping your factory features like OnStar and the BOSE audio system working.

It's the key to a clean install without losing functionality.

Brand new, from PAC.