BCM needs changing

[Pete315]

I have one last bug to fix on a newly acquired 03 Yukon. The message left rear door not closed comes up on screen which in turn causes the interior lights to always stay on unless I manually push the button on the light switch to turn off the interior lights. I tested the door switch and get the proper resistance when door is opened and closed. Everything I read points to the BCM. Any recommendations where to purchase a remanufactured BCM? I hope the airbag light doesn't come on after the 30 minute relearn procedure.