Is there a way to shut off the daytime running lights on 1997 Chevrolet Silverado 1500?

No, there's no way to completely disable the daytime running lights (DRLs) on a 1997 Chevrolet Silverado 1500 without modifying the vehicle's wiring. The system is integrated into the vehicle's electrical system and isn't designed to be easily switched off. Any attempt to disable them would require electrical knowledge and potentially void any warranty (if applicable). It's generally not recommended to tamper with the vehicle's electrical system unless you're experienced in automotive electronics.