Combine the Coca-Cola with the ketchup, soy sauce, rice vinegar, sriracha, paprika, ginger, garlic powder, and onion powder in the bottom of a slow cooker.
Season pork shoulder all over with salt and pepper then add to slow cooker.
Cover and cook until very tender (the meat should fall apart easily with a fork), on high for 4 hours or on low for 8 hours.
Using a slotted spoon, remove pork from slow cooker and transfer to bowl. Let cool slightly while you make the slaw.
In a medium bowl, combine the green and red cabbage with the pineapple, cilantro, olive oil, and vinegar. Season with salt and pepper.
Shred pork with two forks and pile onto buns. Top with barbecue or teriyaki sauce and a heaping spoonful of coleslaw.
Recipe by 5* trending recipes with videos at https://food.theffeed.com/2021/09/24/hawaiian-coke-zero-sugar-pulled-pork-sandwiches/