ABS and brake lights turn on and stay on

2003 GMC SONOMA
60,000 MILES • 6 CYL • 2WD • AUTOMATIC
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GEORGE GOBBLE
  • MEMBER
  • 1 POST
Sometimes they don't and it depends if the vehicle is parked uphill or down hill.
Sep 9, 2019 at 6:46 AM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good morning,

There is a fault in the system. There is a code that is set as well. It sounds like you may have a wheel speed sensor that is out. These videos will help us find the problem.

https://youtu.be/rTtAnsOlZU4

and

https://youtu.be/Pb6nXV-iamI

and

https://youtu.be/ANWVTh2RQoQ

and

https://www.2carpros.com/articles/abs-warning-light-on-easy-repair-guide

Please run down these guides and report back.

You can get a parts store to read the code for you for free. Once I know the code, I can help narrow the area of failure for you.

Roy
Sep 9, 2019 at 7:27 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.