In a large bowl combine the milk and bread crumbs, stir until combined.
Add the eggs, minced onion, garlic, mustard, bbq sauce, Worcestershire sauce, seasoning, black pepper and the ground beef.
Stir with a wooden spoon until well combined.
Line your slow cooker with foil and form your meatloaf mixture into an oval shape and place into the bottom of your slow cooker.
In a small bowl combine the Dr. Pepper, BBQ sauce and brown sugar.
Pour half over the meatloaf.
Cover and cook on low for 6 hours or high for 4 hours.
Once cooked through you can transfer the meatloaf to a baking sheet, cover with the rest of the glaze and broil for just 2-3 minutes.
Slice and serve!