Here is the story. As some of you know, I took my car down last weekend for some mods, flywheel, clutch upgrade, CAI, polyurethane engine mounts and so on. Anyway, I buttoned everything up today and got in the car, hit the key and the engine would not crank. Has anyone had this problem? I am getting a check engine light, but OnStar diagnostics is not giving me any help. Right now, I have the battery disconnected again for overnight. When I first tried to start it, I was getting some weird stuff such as the words "Power Steering" in my driver information center. I realized that I did not fully seat the connectors in the ECM when I put it back in, so I did and the "Power Steering" message disappeared, but that was when I got the check engine light. Now when I turn the key on, I hear the fuel pump come on and certain items in the engine compartment "waking up", but still no crank. I thought maybe I left a connector unplugged, but I crawed all around the engine compartment and did not find any that I did not re-connect. I am sure it will be something simple, but I don't know where to look at this point. If you have experienced a similar problem, let me know.