2005 Chevrolet Cobalt Car Radio Stereo Wiring Diagram Whether your an expert Chevrolet electronics installer or a novice Chevrolet enthusiast with a 2005 Chevrolet Cobalt, a Chevrolet car stereo wiring diagram can save yourself a lot of time. One of the most time consuming tasks with installing an after market car stereo, car radio, car speakers, car subwoofer, car amplifier, mobile amp, mobile navigation or any car audio electronics is 2005 Chevrolet Cobalt | Stereo Wiring Diagram 2005 Chevrolet Cobalt. March 31st, 2012 Posted in Chevrolet Cobalt. 2005 Chevrolet Cobalt Stereo Wiring Information. Radio Battery Constant 12v+ Wire: Red/White Radio Ground Wire: Black/White The stereo wiring diagram listed above is provided “as is” without any kind of warranty. Use of the information above is at your own risk.