The ABS module's location varies slightly depending on the specific trim and options of your 1997 Camaro, but it's typically found underneath the dash, near the brake pedal assembly, or sometimes within the engine compartment near the brake booster. You'll likely need to consult a repair manual specific to your year and model Camaro to pinpoint its exact location. A wiring diagram will help you trace the ABS system's wiring back to the module.
While there might be individual relays in the underhood fuse box related to the ABS system (for power supply, etc.), these are *not* the ABS control switch; they are simply power components. Don't mistake these for the main ABS control module.