Cafe Rio Pork Barbacoa (Sweet Pork)

This is a Cafe Rio copycat recipe.  There are several of them online, but this is THE official version, from someone who actually knows!  ;)

Pork Barbacoa
3-4 lb. pork loin roast
1- 2 liter of Coke, not diet!  (disclaimer:  I use Dr. Pepper.  I don't like Coke.), divided
1- 20 ounce can of mild, red enchilada sauce
2 cups brown sugar
       Put the roast in your large, removable crock pot dish.  Pour enough soda (Coke or DP) over the roast to cover it.  Save 2 cups of the leftover soda for adding to the recipe later!  Place the lid on and set it in the refrigerator overnight.  In the morning place the dish back into your crockpot base and cook on high for 5 hours.  After 4-5 hours, remove the roast from the crockpot.  Empty the liquid from the crockpot and discard it.  Wash the pot clean.  Cut the roast into quarters and plce them back into the clean crockpot.  Add the enchilada sauce, brown sugar and the 2 cups of soda saved from the night before.  Cover with the lid, place the crockpot back on the base and cook on high for another 2 hours.  After 2 hours, use 2 forks to shred the pork in the crockpot.  Recover and cook for another hour or until the pork is tender.