2003 express se radio

I bought an 2003 Express se van. The old owner had someone try to put in a new stereo. They pulled out all the wires that go into the harness that connects to the back of the radio. The radio is an Delphi Delco 15184933. I hoping someone had the wire diagram so i can reconnect the wires. Thank yo for your time. I hope someone can help me. Eric

Why did you buy it at the first place?

Well VickyLyn i'm disable and cant afford a new car. Plus i live in the van. All i'm trying to do is get a little help to get the radio working. But thank you for your help in this matter.