Congratulations on your new truck, and WELCOME to the site!! Glad to have you on here!! I dont know anything about factory reprogramming, but as far as a chip is concerned, It would be visible on the back of the computer. Just guessing your computer is in the same place as my 02, it will be located left of the E-brake pedal in its own enclosure. (approximately 10x10 inches).There is a black plastic plug on one end of the computer once you get it out. That plug has your computer code on it. If the plug is gone and there is a (chip) in the slot with a wire coming from it, then you have your answer right there. Someone with a lil more knowledge will be along shortly to help you more.
Here is a link to a video on INSTALLING a chip, but you can view it to find out how to remove your computer to check for a chip(or install one at a later date!!)