1999 Gmc Sierra Hey Break Lights Turn On Headlights Press Left Light

1999 GMC SIERRA
178,000 MILES
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hey i have a problem with my break lights. when i turn on my headlights and when i press on my break my left break light goes out, but when i dont use my headlights my breaks works perfectly any suggestions???
Nov 5, 2012 at 5:09 PM
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