Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
these are very common for multi function switch / hazard switch assembly failures that can cause this issue as we know the brake switch is good if you have the center brake light working
if the bulbs are good and the fuses are good see if the white wire into the multi function switch shows 12 volts when you step on the brakes the odds are it will and then replacing the multi function switch should correct this problem you are having
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if you run a temp wire from the white wire off the brake switch tot he white at the multi function switch just for testing purposes will the rear brake lights then work ?
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