Product ID: MTRGMOS-LAN-04
Manufacturer: Metra
Product Description: The GMOS-LAN-04 is designed to retain the amplified sound systems, retain Onstar, and retain the warning chimes that are normally lost when the OEM radio is removed. It also provides a 12 volt accessory output for proper aftermarket radio operation. The GMOS-LAN-04 also provides a mute, parking brake, VSS or speed sense, and a reverse output to make installing an aftermarket navigational radio simpler and less time consuming.