The Vehicle Speed Sensor (VSS) on a 2005 Chevrolet Impala is located on the transmission housing. The computer uses the VSS to determine shift points, activate and deactivate cruise control, and maintain constant speed when using cruise control. The Impala's VSS is gear driven. If the VSS is not working properly, there are several symptoms you may notice. The most common symptoms are the transmission does not shift properly and the cruise control does not keep a steady speed.
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Things you need
- Floor jack
- Jack stands
- Lug wrench
- Set of sockets
Raise the Impala with the floor jack and support it with jack stands. Remove the right front wheel using the lug wrench.
Unplug the VSS electrical connector by pushing in on the tabs and pulling the harness plug out of the sensor. Remove the bolt on the speed sensor using the appropriate socket. Gently pull the sensor out of the casing.
Remove the O-ring from the old sensor and clean it by wiping any debris off, if the new VSS did not come with a new O-ring. Slide the O-ring on the new sensor.
Push the VSS into the casing. Since it is gear driven, you might have to rotate it back and forth gently to get the gears to line up. Reinsert the bolt. Tighten the bolt to 106 inch-pounds of torque. Plug the wiring harness back in.
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