* Vehicle Speed Sensor (VSS): This is the most common speed sensor and is typically located on the transmission case. It's usually a fairly small sensor with a single wire connector. The exact location on the transmission case can vary slightly depending on the specific transmission (e.g., 700R4, 4L60E). You'll likely need to look underneath the vehicle to find it.
* ABS Wheel Speed Sensors (x4): Because it's 4WD, it will have four of these, one for each wheel. These are located within the wheel hubs themselves. You'll have to remove the wheels to access and inspect them.
To be certain, you should consult a repair manual specific to your 1996 Chevy Blazer 4.3L 4WD. A Haynes or Chilton manual will show diagrams and detailed locations. Using a vehicle-specific repair manual is highly recommended for accurate location identification and proper repair procedures.
