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There is a plastic drain plug with protruding tabs on the bottom left side of radiator(driver's side)... NOT on the back of the radiator as others have INCORRECTLY stated. You will need a 3/4 socket. Go up from the bottom of the car, there is an access hole through the lower splash shield.

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11y ago
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Anonymous

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3y ago

Driver side

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Q: Where is the radiator drain plug located on 2003 Buick Regal?
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