Strange information for my 08 G.C. limited 5.7 hemi V8. A few weeks ago my radio / C.D. player was operating intermittently. It would switch to G.P.S. with no warning. One morning the radio would not operate at all. No sound, panel lights,C.D. door, nothing. I thought a fuse was blown. Next day the vehicle would not turn over at start, just the click click of a starter motor not engaging. After a jump and reading from AAA a new battery was installed. Every thing back to normal. Full starting cranking and best of all radio back to normal. Moral to the story: no radio indicates battery issues. p.s. dealer wanted to change out radio to which I found a second opinion.