Since picking this vehicle up a few weeks ago, the gauges (Temp, Speedo, Odo, and Fuel) have been dancing and/or just shutting down. There's no power loss, the main computer still operates and shows speed, DTE, etc... The previous owner mentioned something about a module (Body Control Modul?), and that may be the culprit. I'm not sure where to look for this, and can't find the location on REAL OEM. There is a spot behind the driver seat in the C pillar that has some sort of small black box, but I cannot find any description about what it is. Does this sound correct? Would the BCM control the instruments?