Preheat oven to 300° F.
Combine chili sauce, Coke and soup mix.
Place brisket in a foil-lined baking pan. Pour sauce mixture over brisket and cover with another sheet of foil sealing edges.
Bake at 300° F for 3 to 3 1/2 hours until tender.
Carve brisket against the grain and serve the pan juices as a sauce.
Servings: 6