PAC C2R-GM11B Vehicle Wiring Interface for Select 2004–2009 GM Vehicles Without OnStar – Retains Factory Chimes & RAP

Upgrade your vehicle's audio system without sacrificing essential factory features with the PAC C2R-GM11B Vehicle Wiring Interface. Specifically designed for select 2004–2009 GM vehicles lacking OnStar, this interface ensures a hassle-free installation of aftermarket radios. It retains critical factory functions such as safety warning chimes and audible turn signal indicators, preserving the original driving experience. The interface also supports Retained Accessory Power (RAP), keeping your radio operational after the ignition is turned off, just like the factory setup. Compatible with both amplified and non-amplified systems, and featuring a Micro-B USB port for updates, the C2R-GM11B is a versatile solution for modernizing your vehicle's audio system while maintaining its core functionalities.