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2010 Suburban BCM Parasitic Draw

Dupridog

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Dupridog New Member

Dupridog

Posted
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Hello -

I have a 2010 Suburban LT 4WD, and have narrowed down a parasitic draw to the BCM fuse on the inside fuse panel. If we don't drive the vehicle for 2+ days, I have to jump start it.

Let me preface this with some facts. I've replaced the battery recently, and there is nothing plugged in to any of the accessory outlets. I have an aftermarket radio and DVD player, but they are wired correctly (DVD NOT wired to the dome light, radio uses a wiring harness adapter, so pretty certain that it is wired correctly). I've seen the TSBs about the 2007 models BCM, but this is for a 2010.

Now back to the issue. At rest, after 10 minutes or so, the truck has about a 300ma draw (still relatively high - normal is somewhere around 50ma). Then, every 10 minutes or so, I get ~ 2A spike, then it drops back down to 300ma. The draw only drops when I pull the BCM fuse: down to ~ 50ma (normal). No other fuses (I tried all of them - under the hood and inside) have any effect on the draw. I've also heard some odd clicking coming from under the dash somewhere that seems to coincide with these spikes, not sure if that is related.

Chevy dealer wants $300 to diagnose it, and (they say likely) $600 for a new BCM. They say flashing it wouldn't do anything. If it is definitely the BCM, I'd rather find one on ebay for much cheaper and (try to) have a shop reprogram it. Is that possible? Just wanted to reach out and see if anyone has any insight on what to try next?

  • 3 years later...

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