How do you replace the speedometer sensor on a 1996 Buick Skylark?

To replace the speedometer sensor on a 1996 Buick Skylark, first, ensure the vehicle is parked on a level surface and the ignition is off. Locate the speedometer sensor, which is typically found on the transmission; disconnect the wiring harness and remove the retaining bolt. Then, carefully pull out the old sensor, insert the new one, secure it with the bolt, and reconnect the wiring harness. Finally, test the speedometer by starting the vehicle and checking its functionality.