Remove the inside parts of a whole chicken and dispose of them. Fill the cavity with lemon halves. Pat the outside of the chicken dry with paper towel before generously salting and peppering.
Prepare a slow cooker by adding a makeshift rack with aluminum foil to keep the chicken one inch off of the bottom of the slow cooker.
Pace chicken in the slow cooker and cook on high for 3-4 hours, or until the thickest part of the thigh registers at 165 degrees. Remove from the slow cooker, place chicken on a baking sheet and broil for 5-10 minutes until the skin is nice and crispy.