Do they work? YES, and the Prodigy works very well.
Will it void the warranty? NO. I suppose how it is installed might if some hack messes up the wiring but, as stated earlier, late model trucks come with a plug that accepts the controller harness. Call you local Chevy dealer and see if they carry one.
For those who “wouldn't have one”, you are in luck. Most manufacturers today have integrated ones available. You win! For the rest of us, a good add on brake controller will work and it will work as well as the integrated ones.
