inputs.text: flicker perfect fit aftermarket stereo lots glinches - beautiful unit vehicle theres flickering screen gps mode looks great fits perfect 2008 gmc sierrahowever would not reccemend anyone purchase piece garbage unit installed 2008 gmc sierra cost 10000 told not guarantee aftermarket radios would work properly encountered problems would uninstalled another 10000 crossed fingers headed home listening cd player plugging address gps began flicker control cd player started make noise like time bomb things started coming display like \\loading\\ \\open\\ im like made phone call bluetooth heard interference increased speed motor time get home pissedi tried contact koolertron informed situation women tried explain text messages correct problem mispelled words point wanted compensated radio installation told want compensate radio going lose installuninstall shipping back please read review trust not repeat not buy bullcrap