The problem i am having with my car, when i shut the key off, the digital dash, and climate control center stays on. The blower motor will also kick on while the car is off. While its off, you can also opperate the rear fan, but the radio is the only thing that wont opperate while the key is off. When the car is running, everything works as it should. I have to disconnect the battery overnite or it goes dead. 1995 seville sls any suggestions

Have you ran the codes on the DIC? If you dont know how go to the sticky at the top of the seville forum then come back here and post the codes. It sounds like an ignition switch at this point, but could be other things......

One of the 2 RAP relays is probably sticky. Behind the rear seat back rest in the trunk is the so-called Electronics Center. On the lower driver’s side you have 4 stands with relays on. The largest one is the RAP relay, the backup RAP relay is the next stand to the right.
If that’s not it then I would have a good long look to the ignition switch.