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2011 Suburban Unknown Wire

Old December 25th, 2010, 8:34 AM
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Default 2011 Suburban Unknown Wire

Hi,

I just got a 2011 Suburban 4x4 5.3L with HD Tow Pkg. In poking around under the hood, there is a red wire with an eye type connector rolled up between the underhood fuse box and the fender, any ideas?
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Old December 26th, 2010, 12:00 AM
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Welcome to the forum.

Not sure but I think it's if you hook up a trailer brake controller or maybe it's for the OEM brake controller that needs to be hooked up. If no one else knows for sure, ask your dealer's service mgr.
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Old December 26th, 2010, 6:26 PM
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Thats exactly right, it is for the electronic brake controller. The other wire is for the charge line out to the pollack connector located under the rear bumber.
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Old December 27th, 2010, 6:59 PM
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I'd double check
As I think the "red" is for the 12v for the trailer harness for a trailer battery, I think the trailer brake wire is located between the fuse box and fender well and is "blue"
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Old December 30th, 2010, 6:57 PM
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I stand corrected, it is also red w/black stripe, I went out and looked at mine and its still bundled up and is red. The trailer battery wire is also red w/black stripe and is located below the brake booster...
I don't recall where the hell I got the blue from....
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