Look for it:
* Near the steering column: This is the most common location. It's usually tucked away, but should be within easy reach of your knees when you're sitting in the driver's seat.
* In the area of the fuse box: The OBD port may be near or even integrated into the fuse box area.
If you can't find it immediately, try shining a flashlight along the area under the dash on the driver's side. The connector is typically a 16-pin rectangular shape.
If you're still having trouble, searching online for "OBD2 connector location Chevy S-10 [Year]" (replacing "[Year]" with your truck's year) will likely yield more specific results and even pictures. Your owner's manual might also provide this information.