The front driver side and rear passenger side lights do not flash?

1992 GMC SIERRA
300,489 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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RODJAMES
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  • 25 POSTS
Also, my brake lights only work when I’m in park, but not while I’m driving.
Mar 16, 2024 at 7:56 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,721 POSTS
This happens when the flasher is starting to go out. Here is the location of the flasher so you can change it out. Check out the images (below). Please let us know what happens.
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Mar 17, 2024 at 4:08 AM
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RODJAMES
  • MEMBER
  • 25 POSTS
I meant to say the passenger side of the brake lights doesn’t work while the driver side does.
Mar 18, 2024 at 2:44 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,721 POSTS
Yep, this will still be the flasher, I would swap it out to fix the problem.
May 11, 2024 at 6:27 AM
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