Hmmmmmm, checked GM parts direct and the electronic brake control module for this vehicle shows an MSRP of aprox $1800.00. GM Parts direct price is just under $1000.00. There are a couple of others for all wheel drive depending on equipment but I chose this one as its the most expensive of them all. I also found this place that rebuilds EBCMs:
Link
Good luck, hope you can get at least another 100k out of it.