To be sure, you should:
1. Consult your owner's manual: This is the best place to find the precise location.
2. Check the fuse box diagram: The fuse box cover usually has a diagram showing the location of relays and fuses. Look for one labeled "flasher" or something similar.
3. Look for a small, square-shaped relay: Flasher relays are usually small and have multiple prongs. They're often grouped with other relays.
If you can't find it using these methods, a search online for "1989 Chevy Camaro flasher relay location" with images might help visualize where it is. Remember to disconnect the negative battery terminal before working on electrical components.