Season the roast generously with Montreal steak seasoning, granulated garlic and salt and pepper.
Add the 1/4 cup water to the bottom of the crock pot and add in the roast. Cover and cook on low for 7-8 hours or on high for 4-5 hours.
Drain all but about 1/3 cup of the cooking liquid off and shred the roast.
In a small bowl, mix the 1 tsp salt, 1 tsp onion salt, 1 tsp granulated garlic and pepper together. Stir it into the meat until well incorporated.
In a bowl, make the Creamy Taco Sauce by combining the lime juice, sour cream, mayonnaise and taco seasoning together.
To warm the corn tortillas, preheat the oven to 350 degrees F. Wrap the corn tortillas and in foil and bake 15 minutes.
To serve, stack 2 corn tortillas together and top with some of the meat, shredded cheese, pico de gallo, and drizzle with the creamy taco sauce. Makes 12-15 tacos.