WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wiper/Washer System Wiring Diagram (Corvette - 1999)
Fig 2: Wiper/Washer System Wiring Diagram (Corvette - 2000)