New washer bottle cap  as shown for many GM vehicles ..60's to early  80's GM vehicles.

This needs to have a  underside sucker pipe that would go down into the washer jar.. so water is  sucked up washer fluid via a hose to the wiper motor.

Buick:

• 1973-74 Apollo

Ch evrolet:

• 1967-74 Camaro
• 1976-81 Camaro (models equipped with pulse wipers)
• 1982-83 Camaro
• 1967-75 Corvette
• 1962-84 Chevrolet / GMC truck
• 1962-84 Impala / full size
• 1962-74 Chevy II / Nova

Oldsmobile:

• 1973-74 Omega

Pontiac:

• 1967-74 Firebird
• 1982-83 Firebird
• 1971-74 Ventura