Trim any excess fat from the pork.
Add all ingredients to the slow cooker and cook on low for 8 hours, or until the meat is so tender it’s falling apart.
Let the pork cool enough to handle, then remove from slow cooker and place in a large bowl. Shred the meat with two forks (or by hand). You will end up with about 10 cups of meat.
Skim the fat from the leftover juices in the slow cooker and save the liquid for reheating your meat later, if desired, to help keep it moist.
To make carnitas tacos, serve the meat in tortillas with your favorite taco toppings, such as sour cream, cilantro, radishes, pineapple, chopped red onion and lime wedges.