Wiring 2009 ppv Tahoe

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408tahoe

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I’m trying to figure out what this box controls it is a 2009 tahoe ppv I was doing a dash replacement and notice my radio was connected to this fuse box so I unplugged the radio hot wire and plugged the other connection back into it so spot which is the second up from the bottom left so good insight would be helpful or where I would get this info from thank you
 

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Sparksalot

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It’s an auxiliary power block. You can find info in the GM Upfitter guide.

here’s what it looks like with the cover in place.

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