01 -
Place chicken breasts into the slow cooker.
02 -
Pour barbecue sauce over chicken and add pineapple chunks and diced red onion.
03 -
Slow cook on low for 6 to 8 hours or on high for 3 to 4 hours until chicken is tender.
04 -
Shred the cooked chicken using two forks directly in the slow cooker to absorb flavors.
05 -
Serve the shredded chicken on hamburger buns and top each with shredded cheddar cheese.