Very odd electrical issues

rammsm

Radio automatically switching back and forth from radio to cd. It will turn back on by its self and start switching again. Gas hand showing empty when plenty of gas is in car. Door open light comes on when all doors are shut, causing the dome light to come on. Lights on rearview mirrors come on by themselves and the door lock mechanism keeps trying to lock the doors when they are already locked. We took it to dealer and no codes showed up plus, believe it or not, could they get the problem to replicate its self while they had it for 3 days.