Spray the inside of your slow cooker with a nonstick spray, this will prevent the bbq sauce from burning and sticking to the crockpot for easier cleaning.
Layer the chicken, crushed pineapple, and BBQ sauce into your crockpot.
Turn the slow cooker on low for four hours.
At about the two-hour mark, stir everything together well.
Make sure you use a meat thermometer to ensure that the chicken is thoroughly cooked.