1964-1966 Chevy GMC Pickup Truck 2 Spd Wndshld Wiper Sw withWasher NOS 1993641This 1964 1966 Chevy GMC Pickup Truck 2 Spd Wndshld Wiper Sw withWasher NOS 1993641 is a NOS windshield washer wiper system part for restoring the factory windshield wiper system. It is intended for buyers who need the correct original style part rather than a generic replacement. SEC Restoration Notes This 1964 1966 Chevy GMC Pickup Truck 2 Spd Wndshld Wiper Switch w Washer is a NOS GM part 1993641 Fits Application 1964 1966 Impala, Bel Air,