Pontiac Grand Prix? Had it to Pontiac Dealership, and a local mechanic. Both could not find the problem. BCM was replaced, Ignition switch replaced, RAP relay replaced, and nothing. Whenever the BCM "chime" goes off (indicating door open, low fuel, trunk ajar, etc..) My radio and interior lights will cut out for a second then come back on. Nothing else is affected. Anyone have any ideas? It's driving me nuts!