To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. The manual will have a diagram showing the location of all relays and fuses.
2. Check the fuse box under the hood: Many Aveos have the fuel pump relay located in the under-hood fuse box. The box often has a diagram on the inside of its cover identifying each relay and fuse.
3. Check the fuse box inside the car (if applicable): Some models might have it inside the cabin, usually near the steering column or under the dashboard. Again, check the cover for a diagram.
4. Look for a relay labeled "Fuel Pump" or with a fuel pump symbol: The relay itself might have markings indicating its function.
Without knowing the specific year and model of your Chevy Aveo, I cannot give you a precise location. Providing that information will greatly help in finding the correct answer.