I have a 2000 express 3500 LS and I want to install a new radio but I don't know what will actually fit in the space. I tried one that was a 6" screen and it was too small, width wise to fit and I couldn't find brackets to make it work.

this has the slide in radio with the clips that hold it in place. anyone have anything that works?

 

Have you tried crutchfield.com? You can put in your vehicle and find what fits in double or singled din. They have a huge database of different vehicles and what fits and what doesn't.