Line slow cooker with a slow cooker liner or lightly grease with non-stick cooking spray.
Season pork on both sides with garlic powder, thyme, salt, and pepper.Place pork into slow cooker.
In a small bowl, whisk chicken broth, honey, balsamic vinegar, and Worcestershire sauce. Pour over pork.
Cover and cook on low for 6-8 hours or on high for 3-4 hours.
Move pork to a serve board and let rest for 5 minutes before slicing.