* 4L60E automatic transmission: The Vehicle Speed Sensor (VSS) is typically located on the driver's side of the transmission, near the top. It's a relatively small sensor with a single wire connector.
* NV3500 manual transmission: The VSS is integrated into the tail housing of the transmission. Again, it's a relatively small sensor with a single wire connector.
To be absolutely certain, consult a repair manual specific to your 1999 Chevy Suburban's year, make, model, and *transmission type*. A diagram will show you the exact location. You can find these manuals online or at auto parts stores.
