Radio Reception

2002 M/C SS. When I am listening to FM radio and turn on the rear defroster the reception is very poor. I know the antenna is in the rear window. There are a few of the defroster grids not working. Is there anything I can do?

Thanks,
AL

You'll have to repair the grids first (they make a brush on repiar that works pretty well). There is a module in the rear c-pillar that may have gone bad also (gm#10289183 dealer retail $54.01)