This is a common GM specific problem. Your turn signal switch contains an elaborate networking device that has to cancel brakelights while running a turn light. Often times the ground within the turn signal switch is lost causing your situation. After investigating such other possibilities as fuses and loose grounds it may become necessary to replace the turn signal switch. Thank you, Dana
Abosolutely not. All you've got to replace is the turn signal switch sold seperately at all auto part stores. Special tools are required to perform this exchange so I'd suggest having it done at a repair shop. Thanks again,Dana
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Are the bulbs good. do these use the same bulbs for brake/turn signals?. if the high mount light was working, then the brake light switch was good. brake light power goes through the turn signal switch. you will need to get a wiring diagram and verify the power is going in and coming out of turn signal switch.
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Yes the bulbs were replaced to try to fix the issue. had been an ongoing issue w/ the blinkers alraedy, i solved this by using a rubber band around the steering wheel and blinker arm to create tension to pull it in. It makes sense that this is now creating the brake light issue. Is the only fix to replace steering column?
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