I have the same problem with a 2004 Grand Prix. ABS, Brake and Traction warning lights on dash and in the warning display. I took the battery out for a day trying to reset it but it didn’t help. It started immediately after the previous owner had the transmission replaced so I suspect it was something that the shop did. I hope you can figure it out and let me know if you do. I was given the car so I don’t want to put a bunch into it. I may take it to the dealer and see if they can reset it.