CDog77

I have a 2020 Chevy Silverado and I get a park assist error on my dash when putting in reverse. I recently have an accident on bumper and got the repairs done by abra but they said they can't fix and need to bring to a dealership. They are saying all the sensor tested fine. I tried to see if there is a fuse but could find anything. Also could find anything online about this. My park assist worked before the accident. I also use a stethoscope to listen to the sensors. I am thinking the module behind the rear seat might be bad but that is were I am at with out brining it to a dealership. We're should I start TS this?