Radiopro4 PAC RP4-GM31 Stereo Replacement Interface</br>2012 Avalanche?? Sierra?? Silverado Suburban?? Tahoe & Yukon vehicles equipped with a navigation radio are not compatible. These vehicles must use the RP4-GM32</br>Chevrolet Express vans & GMC Savannah vans equipped with diesel engines are not compatible</br>Navigation ready: Data controlled accessory and navigation outputs?? Built in pre-programmed steering wheel control (SWC) retention</br>Retains factory amplifier (In Premium Amplified Systems only two input channels can be used from the aftermarket radio?? therefore there will be no fading capability of the aftermarket stereo)?? Provides factory RSE activation</br></br>Product Description</br></br>The innovative new RadioPRO4 RP4-CH11GM31 radio replacement interface comes pre-loaded with amplifier retention and steering wheel control (SWC) software?? navigation based output signals and other features that save time and money during installation.</br><br/>http://www.amazon.com/gp/product/B0072LCXIM