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Re: '04 Yukon XL Denali - Body Control Module Experts?
The body control modules have been known to cause electrical issue like what you describe.
Your ac issue could be caused by the blend door as that is common issue. I have also seen the AC control cause issues as well.
Most shops are either going to throw parts at it with you footing the bill.
What you need to do is monitor the draw and start unplugging circuits 1 at a time until you find it.
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