2012 Cruze LTZ with 42,000 miles. The radio touchscreen will intermittently cut out and reboot, more often than not it wont fully return to working order (missing buttons, graphical glitches etc) The battery cable has been replaced and the software has been updated by a dealer. The instrument panel screen will also show "bonnet" instead of "hood" when the hood is opened, and "tire" will be spelled "tyre" (no settings were manually changed). We haven't been able to find a correlation with the radio cutting in and out. All of the fuses were pushed on and are all firm, all battery connections are tight and corrosion free, battery has been tested to be good.
The dealer wants $1,300 to replace the radio unit. Is this the recommended action? If the instrument panel screen is changing on it's own, could the radio still be the issue? To me it sounds like a bigger electrical problem. What should be done?