Type in your service tag on Dell support website.  Look under View Product spec. If your motherboard has vPro it will be listed there. If not listed you probably do not have vPro.  For example this 9020 view product spec says  also if you have blue intel vPro factory sticker on front bezel, that is a good sign you have vPro. [IMAGE]  
I recently upgraded from i5 4590 3.3 ghz CPU to i7 4790 3.6 ghz CPU, please i would like to know how do i know if my computer has intel vpro or has no intel vpro?
intel vpro question