2002 Pontiac Grand AM GT...
The car fires up, but I don't have any electrical on the inside (dash,
windows, locks, headlights, radio, etc..) for a delay of 10-15 seconds.
doesn't happen every time, but it is quite frequent (and the delay
isn't always the same). The dealer replaced the BCM, but that didn't
fix the problem. It occurred again a few days later and has been
happening ever since.
I can't isolate a specific condition when this happens, but it does
seem to occur quite a bit after the car has been sitting out in the hot
sun all day while I'm at work.