To be certain, you should:
1. Consult your owner's manual: This is the best resource for the specific location on your vehicle.
2. Check a repair manual (like a Chilton's or Haynes): These manuals have diagrams showing the location of all components.
3. Look online: Search for "1992 Chevy S-10 Blazer oil pressure sensor location [your engine size]" Images from others who have worked on the same engine can be helpful.
Remember to be careful when working near hot engine components. Allow the engine to cool completely before attempting to locate the sensor.