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WOW!! Finally took a look under my Acadia. Installed a Curt Trailer Hitch. Found the 4 wire on Driver side and located the 7 wire on passenger side. Also found a white larger connector in the center directly towards front in front of the spare and a smaller connector on passenger side to left of exhaust. Could these cause problems with being exposed and what are they for? I am going to let the dealer install trailer harness so there is no threat to the warranty. :banghead:
 

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Any news on this?

I'm trying to find an easy way to tap into the reverse light power for an aftermarket backup sensor, and I'd love to find out there is an accessible connection under the chassis already!
 
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