[wiswind]

As to the VSS, that is the Vehicle Speed Sensor.
The VSS is mounted in the transmision.....physically on the back side....at about the middle.
There is a little gear that turns a electrical speed sensor....and drives the cable that goes up to the speedometer/odometer in the dashboard.

The PCM uses the electrical signal for transmission shift points, etc and for the ABS system.....to compare to the wheel speed sensors.

The VSS would be a easy replacement.....except that it is a very difficult location to get at.
I have not done this repair, but those who have.....and posted here report that it is hard to get at......above one of the catalytic converters......and has a heat shield....

For the Cruise control......the first thing to check would be the brake pressure switch that is located on the bottom of the master cylinder......has the electrical wires going to it.