Place the garlic powder, onion powder, salt, black pepper, crushed red pepper flakes, and granulated sugar in a small bowl. Stir to combine the seasoning blend.
Drizzle the pork with 1 tablespoon of olive oil.
Sprinkle the pork with half of the seasoning blend.
Using your hands, rub and massage the seasoning into the pork.
Heat the remaining tablespoon of oil in a large pot or Dutch oven over medium-high heat.
Once hot, add the seasoned pork and sear on all sides, about 3 to 4 minutes per side, until brown.
Transfer the seared pork to your slow cooker.
Add the vinegar and the remaining seasoning blend to the cooker.
Cook on low for 12 hours or on high for 6 hours, turning the pork occasionally for even cooking.
Once the pork is fork tender, remove from the cooker and place in a large bowl or pot. Keep the pan drippings in the cooker. Shred the pork into bite-sized pieces using forks.
Return the shredded pork to the cooker and stir to combine with the pan drippings. Keep warm until ready to serve.
To make the coleslaw, place the coleslaw mix, scallions, mayonnaise, vinegar, salt, sugar, and pepper in a large bowl.
Toss to coat and combine.
To assemble the sliders, divide the pulled pork between the slider roll bottoms.