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I would wait a few days to a week to see if the others update. That should definitely help you get better rates. What rates were you getting before? If all your inquiries are car loan related, it should be ok if you keep it to a one month period or less.
Some lenders are pretty reliable in which CRA they pull their report from. You might be able to find a lender that only looks at TU. Or if you let a dealer shotgun your app, randon chance should say a couple will pull TU (not recommended that you let a dealer secure financing)