This is from my '99 shop manual. A '00 is probably the same. It looks like you want the lightgreen/white wire that comes from the VSS. You should be able to find it at the H-13 connector above your left foot or at the B-5 connector on the back of the meter cluster or at the D7 pin on the white, 32-pin connector on the back of the PCM.
I hope this helps.
Mark