Combine caramels and evaporated milk. Melt in microwave about 2 minutes or until melted. Set aside. In large bowl, combine cake mix, margarine, 1/3 cup milk and pecans. Press half of dough in 13x9x2-inch baking pan sprayed with Pam. Bake at 350 degrees for 8 minutes. Sprinkle chocolate chips over crust. Pour melted caramel next. Crumble rest of dough over this mixture. Bake 18 to 20 minutes more at 350 degrees F. Cool. Cut into bars.