Where is the speed sensor on a 99 Chevy s10 pickup?

The speed sensor on a 1999 Chevy S10 pickup is located on the differential housing. It's usually on the passenger side of the rear differential. However, it's important to note that the exact location can vary slightly depending on the specific model and options. It's a small sensor, often with a single wire connector. You might need to get underneath the truck to locate it properly. A repair manual specific to your year and model S10 will give you the most accurate location.