The battery went dead in the 09 Tahoe. took it out to return for a new one. When I put the battery back in the unit the satellite radio did not work anymore. I have a Sirius tuner I put in 4 years previous and it was working great until then. Tried to refresh the Sirius tuner through Sirius without success. All other radio functions worked, AM/FM CD and AUX. I tried removing battery cables and touching them together and then reconnecting them. That didn't help. Can a dealer do some sort of reboot on the satellite tuner? That is my next step. Any other things that can be done to remedy the problem?