I have a 05 Colbalt that was given to my wife, we had to jump it to get it out of the friends place. I drove for 45 minutes no issues.
Stopped to get wipers and battery was dead, I bought new battery, and after the shifting became erratic and by the time I got it wouldn't shift and the speedo quit.
Also the power steering warning is lit up, and bangs hard when going from park to drive and reverse..
I nephew hooked up a diagnostic tool to it and it said lost comms to PLC

Any help would be great..

Thank you
Brian