PAC GM1A-R RadioPRO Advanced Interface for GM Vehicles

PAC GM1A-RRadioPRO Advanced has been engineered to save you time and seamlessly integrate into a vehicle's databus system to retain features such as factory amplifier and safety notifications. It features improved sound quality of warning chimes through a provided speaker, and direct USB connection for quick and easy product setting adjustments and firmware updates. It also saves you time on the installation with a streamlined harness design, smaller housing, and easier adjustment of chimes and factory amplifier gain.