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Why is there no lights or highbeams working on a 97 gmc 6500 is there a relay switch and where is it?
Wiki User
∙ 17y ago
The relay will be in "The Black Box" in the engine compartment.
Generally located on the drivers side. An usally has markings on it to indicate what is what on the inside. Good Luck and Remember.
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Wiki User
∙ 17y ago
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