How many sensors on a 1999 chev s10 truck?

There's no single definitive answer to how many sensors are on a 1999 Chevy S10. The exact number varies depending on the engine, transmission, and optional equipment (like ABS, traction control, etc.).

A 1999 S10 would likely have at least a dozen sensors, including but not limited to:

* Engine sensors: Oxygen sensor(s), crankshaft position sensor, camshaft position sensor, MAP (manifold absolute pressure) sensor, throttle position sensor, coolant temperature sensor, air flow sensor (MAF or its equivalent), knock sensor(s).

* Transmission sensors: Vehicle speed sensor, neutral safety switch.

* Other sensors: Brake fluid level sensor (if ABS equipped), possibly a steering angle sensor (less common in 1999).

To get a precise number, you'd need to consult a repair manual specific to your 1999 Chevy S10's engine and options. Even then, the count might vary slightly depending on the manual's definition of "sensor."