I was working in my signal lights and my dash & rear lights don't turn on on 2003 Buick Regal

I change my turn signal lght bulb and now my dash & rear lights don't work : when I open the door there's a beeping chimes that stays on

2 answers
Check the tail light fuse, are the front park lights working? The dual element bulb works with both tail light and turn signal. Check the bulb you installed for a problem. The dash lights are powered through the tail light fuse as well.
Make sure your bulb was the right one.