Heat the olive oil in a skillet over medium heat. Add the turkey cubes and cook until lightly browned on all sides, about 5 minutes.
Transfer the browned turkey to the slow cooker. Add the butternut squash, onion, garlic, sage, carrots, salt, and pepper.
Pour the chicken broth over the ingredients and stir to combine.
Cover and cook on low for 7 to 8 hours until the turkey is tender and the squash is soft.
Stir once halfway through cooking if possible, then serve hot.