The vacuum actuator on a Chevy S-10 4WD is typically located
on the transfer case. It's the part responsible for engaging and disengaging the front driveshaft. It's usually a small, cylindrical device with vacuum lines connected to it. However, the exact location on the transfer case can vary slightly depending on the year and specific model of your S-10. You'll likely find it near the top or side of the transfer case, often fairly close to where the front driveshaft connects.
To be certain, you should:
* Consult your S-10's repair manual: This will have diagrams showing the exact location of the actuator.
* Look for vacuum lines: Trace the vacuum lines leading from the engine compartment; they'll lead you to the actuator.
Remember to be careful working under the vehicle. Support it properly with jack stands.
