ADS-HRN-RR-GM3 GM3 Plug &amp; Play T-Harness w/ Speaker<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Works with Maestro ADS-MRR module to allow installation of new receiver with iDatalink port in select GM vehicles</li><li>Retains the use of your steering wheel audio controls and warning chimes</li><li>Retains OnStar (with Bluetooth)， factory backup cam， vehicle customization options</li><li>Displays engine performance data on touchscreen</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ESGU11nVL.jpg" noproxy>