Compatible with select 2004-2008 GM vehicles Provides +12V accessory power output Retains accessory power features Non-Amplified Non-OnStar Interface Harness Includes a direct plug in for the Universal Steering Wheel Control Interface Designed to provide a 12 volt 10 amp switched accessory output along with the rest of the wires needed to install an aftermarket radio Provides VSS (Vehicle Speed Sense), parking brake, and reverse signals to an aftermarket navigation receiver, making the installation easier Dimensions: 8" L x 3" W x 2.5" H Weight: 0.2 lbs