How do you remove a speed sensor on 2004 Chevy Colorado?
If it is 4x4 remove axle from wheel bearing assembly and then remove the wheel bearing assembly. Make sure the tone ring (looks like a ring with teeth) is still attached to the spped sensor side of the bearing, if not, replace wheel bearing assembly with an assembly that comes with the speed sensor. Replacing a speed sensor without a tone ring is pointless because it won't work.
The speed sensor on a 1990 Chevy Celebrity is on the top of the transaxle on the passenger side of the car. To change it unlatch and remove the wire harness then remove the two bolts that hold it in. The speed sensor can then be lifted out of the transaxle. To reinstall a new sensor reverse these steps.