Cajun Slow Cooker Pulled Pork

Name: Cajun Slow-Cooker Pulled Pork
Ingredients: 1/2 cup apple cider vinegar; 1/3 cup ketchup; 1/4 cup plus 2 tablespoons Creole or spicy brown mustard; 1 tablespoon molasses; 2 tablespoons packed light brown sugar; 2 teaspoons paprika; Kosher salt and freshly ground pepper; 1 3-to-4-pound boneless pork shoulder; 2 links andouille sausage; 1/3 cup mayonnaise; 8 soft sesame buns; Pickle slices and potato chips, for serving