2004 chevrolet suburban reverse sense wir

Hi - I have a 2004 Chevy Suburban. I had the truck in the shop after an accident on the driver's side. Now the aftermarket reverse sensing system does not work. Does anyone have a wiring diagram that will allow me to troubleshoot? The audio for the sensing system still works, but the sensors do not indicate anything when backing up. Thanks for any assistance!

I would find it hard to imagine that they got power somewhere other than the reverse light bulb.   If not you may need to follow the wires from the sensors to the brain and see where the wires go from there.