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Old 05-24-2021, 03:42 PM
elcamino72 elcamino72 is offline
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A 71 Chevelle if it is somewhat stock will have a charcoal canister under the hood on the radiator support. There is a vacuum line that goes to a check valve on the top of the canister. There is a seal this that will dry out and can cause a whistle or squeal. Perhaps this is what you are hearing if you can't otherwise locate it.
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