To be sure, you should:
1. Consult your owner's manual: This is the best place to start. The manual will have a diagram showing the fuse and relay locations.
2. Look for a fuse block or relay center: These are usually rectangular boxes with multiple fuses and relays. They are commonly found under the dash, but could sometimes be under the hood.
3. Check online forums: Search online forums specifically for 1996 Chevy S10 owners. Someone might have already posted a picture of their flasher relay location.
Remember to turn the ignition off before handling fuses or relays.