Mix cornbread according to directions on package. Bake and allow to cool.
Fry bacon. Place on paper towels to drain. Crumble the cooled bacon into small pieces.
Mix sour cream, mayo, and dressing mix in a bowl; set aside.
In a large bowl crumble half the cornbread, beans, tomatoes, pepper, and onion together.
In a trifle or clear bowl add the first crumbled layer (around ⅓ of the mix, reserving the remaining for 2 more layers).
Follow with layers of cheese, corn, bacon, and cover with a layer of dressing mixture.
Repeat for 2 more layers, ending with the dressing. Garnish with shredded cheese.
Cover and chill for 10–12 hours.