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Re: '04 Yukon XL Denali - Body Control Module Experts?
Just an update. Since replacing the BCM, I have also replaced the alternator since we would start the car in the morning and although it would start just fine (no more battery draw) the gauge would only read 9 or so volts. I confirmed this with a separate VOM. She would drive the other car during the day. In the afternoon however, the car would start just fine as well but would be charging at 14.2 or so like normal. She would check it every day when she got home. Now I'm at a loss. I resorted to doing what I hate most... throwing parts at a problem. I swapped out the alternator and voila! Its working as normal. Kinda weird though that it wouldn't charge in the morning but would be fine in the evening. Oh well, its fixed for now.
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