What will this fit in

I found a Geo radio that has been sitting around for a while, and I am looking to sell it. I need to know which cars this will fit in. If anyone can point me to a good website that has some kind of database like that; or can assure me of certain cars it will fit in, I can provide a good list of the applications for this radio. Here is a quick description. I can email pictures to anyone who wants to see it.

It is made by Delco, and I am sure it is OEM.
The model no. is 30015807
The serial no is 2047013

If anyone can help me, I would appreciate it greatly. Please advise if more info is necessary.

im sure it will fit into any car...because ive thrown radios from my car into my parents cars...friends cars and so on...

I found a Geo radio that has been sitting around for a while, and I am looking to sell it. I need to know which cars this will fit in. If anyone can point me to a good website that has some kind of database like that; or can assure me of certain cars it will fit in, I can provide a good list of the applications for this radio. Here is a quick description. I can email pictures to anyone who wants to see it.

It is made by Delco, and I am sure it is OEM.
The model no. is 30015807
The serial no is 2047013

If anyone can help me, I would appreciate it greatly. Please advise if more info is necessary.
It Was Gm Models Geo Tracker Earley 90s