2000 Cadillac Catera

Electrical problem
2000 Cadillac Catera 6 cyl Two Wheel Drive Automatic 113000 miles

Have a problem with my radio cutting off. Also when the radio isn't working the remote buttons for the gas tank door and the trunk release don't work either until the radio comes back on. Sometimes the radio comes back on in a few minutes and other times it may not come back on for a long time. Any idea? Thanks
August 12, 2010.

Multi-function relay may be sticking causing these issues. It is located under left side of dash.

Aug 12, 2010.