‘15 Yukon XL Rear parking sensors

[MEA403]

Anyone have there rear parking sensors and blind spot sensors stop working, I’m getting a message that says “service park assist system”?

 

[Doubeleive]

you can check them to see if there is any dirt or dents on any that can cause a problem or if it came loose or if the mounting clip is broken
you can also wave a hand or object over each one individually and see if it beeps or not, be sure to only cover 1 at a time
which ever one does not beep is the faulty one.

 

[Joseph Garcia]

If you have a quality bi-directional scanner, it will tell you which one is the source of the issue.