Step 1 In a medium saucepan, heat the cream over medium heat. Meanwhile, place the chocolate chips in a large mixing bowl. When the cream comes to a simmer, remove the pan from the heat and pour the hot cream over the chocolate chips, whisking until the chips dissolve. Whisk the sugar into the mixture, then the milk, eggs, egg yolks and vanilla to form a custard base.
Step 2 Add the bread to the bowl, gently stirring to coat the cubes with the custard base. Set the mixture aside to allow the bread to soak, about 45 minutes, tossing every several minutes so the cubes completely and evenly soak in the custard base.
Step 3Toss the pecans into the soaked bread mixture, then pour the mixture into a greased slow cooker insert. Cover the insert and place it in the slow cooker. Set the cooker to high heat and cook just until the custard is set in the center, about 1 1/2 hours (the time will vary depending on your model and type), or about 3 hours over low heat. The pudding is done when the custard is set in the center. Turn off the slow cooker, uncover and remove the insert.
Step 4While the custard is cooking, heat the oven to 400 degrees.
Step 5Place the slow cooker insert in the oven and continue to bake just until the top of the pudding is lightly colored and toasted. Remove to a rack to cool slightly.