To find it precisely:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of components, including the flasher relay.
2. Check online forums: Search for "1997 Pontiac Transport flasher relay location" on forums like CarGurus or others dedicated to Pontiac vehicles. Other owners may have posted pictures or detailed instructions.
3. Look near the fuse box: The flasher relay is frequently placed near other electrical components.
4. Be cautious: Disconnect the negative battery terminal before working on electrical components to prevent short circuits.
Remember that the flasher unit might be integrated into a larger unit containing other relays, making it harder to identify immediately. If you can't find it after a reasonable search, it's best to consult a mechanic.