With the stock radio installed, turn on your parking lights and listen for the chime (same sound for key in ignition with ignition off and door opened). Does the sound come from the front left speaker or from behind the dash? If it comes from behind the dash, disconnect factory stereo and turn lights on again, id the chime still there or does it go away? If the sound comes from the left front speaker or goes away when you unplug the factory stereo, you need a different harness, its called a chime harness Pac Audio part #C2R-GM32R, could be the thing you need.
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With the stock radio installed, turn on your parking lights and listen for the chime (same sound for key in ignition with ignition off and door opened). Does the sound come from the front left speaker or from behind the dash? If it comes from behind the dash, disconnect factory stereo and turn lights on again, id the chime still there or does it go away? If the sound comes from the left front speaker or goes away when you unplug the factory stereo, you need a different harness, its called a chime harness Pac Audio part #C2R-GM32R, could be the thing you need.