[Held for Ransom]

" Other than that, the only difference is that your temperature sender wire has two dark green wires whereas mine had only one. "

DrPeP mentions this in his last sentence. That's why I brought up the fact that it differs from your drawing and to check ID tags. I owned my Firebird years ago, and this was laying around and saved when I moved, so I figured it was a Firebird wiring harness.