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By power wire, I assume that you are talking about an amp or another accessory to that sort. You will have to look up behind your brake pedal toward the corner, there should be a small hole cover with a black 2-way, just push the wire through the 2-way. If you car does not have a hole that you can see, you can drill a small one in that area. -Shocker

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Q: How do you get the power wire through the firewall on your impala?
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