2003 Cadillac Escalade new Alternator not charging

Recently noticed some voltage dips with the car (cutting out/Dying). I did the normal tests. Checked the battery voltage when car was off 12.2VDC, then when running 11.6Vdc. Pulled the negative pole from the battery and car died. I ran down and bought a new alternator and slapped that baby in and bada boom badda bing! Nothing! Same situation as above. I pulled the lead off the back of the alternator to measure voltage directly off the post and go 0VDC. Nothing at all. Need help at this point. There is another set of (what looks to be) control wires going into the alteranator. Im not sure if the alternator is dumb or does it get info from a charge controller. If so, where are the fuses or controller? Never! Never get a Escalade!