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:
Ch evrolet:
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1967-74 Camaro
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1976-81 Camaro (models equipped with pulse wipers)
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1982-83 Camaro
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1967-75 Corvette
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1962-84 Chevrolet / GMC truck
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1962-84 Impala / full size
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1962-74 Chevy II / Nova
Oldsmobile:
Pontiac:
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1967-74 Firebird
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1982-83 Firebird
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1971-74 Ventura