Axxess GMOS-09 OnStar Interface for Amplified GM Vehicles with (gmOS09) Built in oversized storage pocket

Built in oversized storage pocket with built in radio supports

RMS Power at 4 Ohms 12

2012-14 Sierra 2500 (w/o Factory Nav)

Speakers that will change your and your passengers' world of sound

Smart brake function turns ALL LEDs into a RED brake light no matter what color or pattern was visible before

Axxess GMOS-09 OnStar Interface for Amplified GM Vehicles with (gmOS09) Built in oversized storage pocketAxxess GMOS 09 Designed to allow the user to require the OEM Radio with an aftermarket unit in amplified GM Vehicles with "Door n Lock" Style harness equipped vehicles with amplified audio system Retain full functionality of OnStar with adjustable volume output Retain warning and door chimes with adjustable level output Retention of Retained Accessory Power (RAP)convenience features Compatible with 2001 2003 Oldsmobile Aurora and 2000 2005 Pontiac