Where is the pulse module control board located on 2003 Chevy s10?

The Pulse Module Control Board isn't a standard component in a 2003 Chevy S10's electrical system. There's no single part with that name. The term "pulse module" is somewhat vague and could refer to several different things depending on the specific system you're referring to.

To help you find what you're looking for, please clarify what system you are working on. For example, are you dealing with:

* Fuel injection: The fuel injectors are controlled by the PCM (Powertrain Control Module), which is the main computer. It's usually located under the dash or in the engine compartment.

* Ignition system: The ignition system uses a different type of control, but not something called a "pulse module" in the typical sense. The components here are typically the ignition coil, crankshaft position sensor, and camshaft position sensor.

* Something else entirely?: Could you describe the issue or component you're trying to find? For example, what problem are you troubleshooting?

With more details, I can help you pinpoint the location of the specific control board or component you need.