I have a 2000 Pontiac Bonneville and I just put a used motor in it. I got it all installed and it was running great. I turned the car off and went to restart it and nothing. It just sounded like the starter was freewheeling so i bought a new starter and same thing. I pulled the inspection cover off and then had my wife try it again. The flexplate was spinning with the starter but the serpentine belt wasnt. So i that the motor was locked up. I can turn it over by hand with ease and it also is turning the flexplate. So my question is why cant i get the car to start?