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Where is the speed sensor located at for a 1989 Chevy 12 ton 4 wheel drive pickup?

The speed sensor location on a 1989 Chevy 1-ton 4x4 pickup depends on the transmission type. There are two common possibilities:

* For vehicles with an automatic transmission: The Vehicle Speed Sensor (VSS) is typically located on the tailshaft housing of the transmission. It's a small sensor often mounted with a single bolt.

* For vehicles with a manual transmission: The VSS is usually located on the top of the transmission case, near the driver's side. Again, it will be a relatively small sensor.

To be absolutely certain:

1. Consult your owner's manual: This is the best place to start. It should have a diagram showing the location of all sensors.

2. Check a repair manual specific to your year and model: A Haynes or Chilton manual will have detailed diagrams and instructions.

3. Look online for a parts diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) let you search by year, make, and model. You can then view diagrams of your transmission to locate the sensor.

Without knowing your specific transmission type (e.g., TH400, 700R4, SM465, NV4500), pinpointing the exact location is impossible. Use the resources above to find your specific sensor location.