If it was your speed sensor, I would think the abs/tcs would turn off as well. Could be another sensor.
You'll need to get a good scan tool used on it to see the bcm/ebtcm codes, if any. Tech2, genesys, etc.
_________________________
'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner