r/Cadillac

I just replaced my cue screen, worked perfectly, didn't start the vehicle, didn't notice any errors. Also purchased 2 new keys and ATPSTOGO ezk911 programmer. I'm not sure what caused the errors, but now I have an ABS, Brake light message, stabilitrac error and steering control error. I removed the negative battery cable when I did the cue screen replacement, is that maybe the initiating step? I tried to program the new keys but received a communication error, then I found a video that says you can just use your safety backup key, but that's not turning counter clockwise. I can do without the extra keys for now, I'm more concerned with the new errors and steering issue which is mechanically present in that the steering assistance is also disabled. HELP!!!?