In my case the warnings went away after a restart. Don't know about the radio.

 

i know on my 2010 i had to push the plug in tighter in the passenger kick plate to get my airbag light to go off when it was on. Once is all it took.

 

Would you happen to have a picture of it?

 

Thanks for all the help, there was a small panel right under the steering wheel and I popped it off, gently stuck a pen in it and then turned the key and it came right out.
Went down to the local auto part place got a new battery...problem solved.
Again, thanks so much.

 

Oh, you read your Owner Manual!

 

My '08 had a new NAPA Legend battery last year, last week same problems as OP . I retrieved it and got a free replacement. Everything good but the tire pressure on the DIC reads psi -- .
The battery I put in my '09 last summer was an AC Delco. No problems Hmmm. Any ideas on the psi readout? thanks john

 

There is a TSB #08-03-16-001B on 2008 models that lose battery power. You will need to go to a dealer (or someone with access to TIS2WEB) and get upgraded firmware for the RCDLR.

 

No, I have no manual, I received the "tip" here. Thank you very much

 

Online Owners Manuals are available for you to download on this site. Moderator Donbrew has a link in his signature. Click on the link and find the manual for your year model.

 

My point was that it is in the Owner Manual. No need to search the interwebs if you have one.