Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Sorry to hear about this. There is a few ways this can go but If the vehicle has continued to start fine you are probably in pretty good shape. When your battery failed initially it will have triggered u-codes in every module of the vehicle. It may have also caused circuit performance p-codes for some devices. The first step would be to simply clear all of the codes and see what if anything remains inoperative. A caddy dealer would be the best as they can clear all modules. As far as the radio it is possible it contributed or is causing these problems. The radio communicates on low speed gm lan and sometimes the failure of one device ie. The radio, can pull down other devices on the network like the instrument cluster. But the first step will be to see if everything is communicating and if so to clear out the communication codes from the dead battery and see if any of the other faults can be duplicated. Once again a GM dealer can do this the best but if you or a local mechanic are going to try let me know and I'll guide you the best I can.
How's the battle?