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Where is the vehicle speed sensor located in a 1999 grand am GT?

The Vehicle Speed Sensor (VSS) in a 1999 Pontiac Grand Am GT is typically located on the transmission. More specifically, it's usually on the output shaft of the transmission, near where the driveshaft connects. However, it *could* be on the differential, depending on the specific transmission type.

Because there's a slight possibility of location variation, the best way to be certain is to:

1. Consult your vehicle's repair manual: This will have a diagram showing the exact location.

2. Use a reliable online parts diagram: Many websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your year, make, and model and view diagrams of parts including the VSS. These often show the sensor's position.

Without either of these, searching blindly will be inefficient and possibly damaging. Remember to always disconnect the negative battery terminal before working near any electrical components.