2007 Buick Lucerne. Cxl. Never had any real problems. Won't start, shift, come out of park, no lights. Changed battery. Still dead no trunk no remote nothing won't let key out. HELP ME PLEASE.

Check the main fuse.

Thanks I've checked all fuses. I'm afraid may be bcs control and shift. It's saying in my computer controls features only available in park. But nothing works. Map lights visor lights headlights come on if turned on. Cluster panel shows symbols but not even a click when trying to start. And key will not come out. Like I said replaced battery. Was bad.

How about a starter?

iT WAS THE COMPUTER, RIGHT?

when all power is gone from the car it's normal that the key will go too start and back one cannot take keys out until power is restored just retrace the battery connection jump it with another car or battery pact .

its the battery jump it