To your slow cooker place the pork.
In a small bowl whisk together the bbq sauce, Dr. Pepper, brown sugar and onion powder.
Pour the sauce over the pork.
Cover and cook on low for 6 hours or high for 4 hours until pork is tender and shreds.
20 minutes before serving make the mac and cheese.
Boil and drain your noodles.
To a large sauce pan over medium heat melt your butter and whisk in the flour and salt.
Whisk in the milk and bring up to a bubble.
Stir in the cheese.
Gently stir in the drained noodles.
Stir to combine.
Remove the pork from the slow cooker and shred the pork.
Pile the pork on the sliders and top with the mac and cheese..
Serve!