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Procedure for On off switch for radio chime. Bing Bing Bi **Click** Silence **Click** ing Bing… Old chimes you could wack. GM found out we did this and made it harder to kill em. They forget we get 'Numb' to the blasted thing going off all the time. When it does go off it's ignored as a nuisance simply because it goes off all the time anyway! Door open with key in ignition is the worst offender. Not shutting up immediately when the seatbelt is fastened, but continuing to finish the chime sequence is unforgivable. Chime for passenger seatbelt while driving is a distraction to the driver. That decision was made before the vehicle was set in motion. No need to cause an accident by distracting the driver over it later. Lets fix the chime with a factory radio. First, you don't want the chime for anything. Blow an engine from lack of a warning chime is a small worth it price to pay for silence! You would ignore the chime anyway because its going off for something else, like low fuel, all the time anyway. You do need the chime to do some programming on some models. This said lets go. Do you really need the front to rear fader? The chime is in the front speaker. 4 Ohm speakers. You lose the Front to Rear fader and have to turn up the volume to double the normal setting. Only disadvantages. Take out the radio. Take care to keep the speaker polarity the same. A dc voltmeter showing you plus and minus readings will help you see on average what wire is more positive. Write down the polarity for all four speakers. Plus of one goes to the negative on the second to put them in series. Optional: Get an Xm wire kit for the Terk XM add on. This allows you to mess up the radio wires in the Terk connector without harm to the body connector. All it does is extend the radio wires and give the Terk it's power and vehicle data. Rewire the speakers to bridge the left front to left rear speaker together in series to get 8 ohms. Rewire the speakers to bridge the right front to right rear speaker together in series to get 8 ohms. Wire the right bridged speakers to the right rear amp only. Tape the front right side amp wires. Use a DPDT switch to switch the left speakers from the left front OR left rear amp. ( To enable the chime for the rare times you need it. Or for service visits. ) Center of switch goes to speakers, first position to front amp (chime on), second to rear amp (no chime). Hide the switch, put the radio back in... Enjoy the silence.