Place the pork boneless loin roast in a 3- to 4-quart slow cooker. Sprinkle evenly with smart fiestaᵀᴹ reduced sodium fajita seasoning, then pour the old el pasoᵀᴹ thick n' chunky salsa over the top so the pork is well coated. Cover; cook on Low heat setting 8 to 10 hours, or until the pork is very tender and easy to shred.

Remove the pork boneless loin roast from the cooker and place it on a cutting board. Shred pork using 2 forks until it is pulled into thin strands, then return the shredded pork to the slow cooker and mix well with the cooking juices and salsa. Stir in the red pepper thinly sliced, green pepper thinly sliced, yellow pepper thinly sliced and onion thinly sliced, making sure all vegetables are coated. Increase heat setting to High. Cover; cook 30 minutes longer or until mixture is hot and vegetables are tender.

Using a slotted spoon to drain excess liquid, place 1/2 cup meat mixture in each warm pkgs old el pasoᵀᴹ smart fiestaᵀᴹ made with whole grain tortillas. Sprinkle each serving with shredded reduced fat mexican cheese blend. Serve immediately with low fat sour cream on the side or spooned over the fajitas.