Add the chicken breasts to your crockpot and season with garlic salt, black pepper, garlic powder, onion powder, and Tajín.
Add the drained Mexican-style street corn, cream cheese, and chicken broth to the crockpot.
Cover and cook on HIGH for 3 hours, or until the chicken is cooked through and tender.
Shred the chicken directly in the crockpot and stir it into the creamy corn mixture.
Add the cooked penne pasta, shredded pepper jack cheese, sour cream, mayonnaise, and a little more Tajín.
Mix everything together until the pasta is evenly coated and the sauce is creamy and well combined.
Top with extra Tajín and fresh cilantro, then serve hot.