Season the chuck roast with salt, pepper, and garlic powder on all sides.
Heat vegetable oil in a large skillet over high heat and sear the roast until browned on all sides, about 4 minutes per side.
Place carrots, potatoes, and onion in the bottom of the slow cooker, then place the seared roast on top of the vegetables.
Tuck the bay leaves around the roast, then pour beef broth and Worcestershire sauce over everything.
Cover and cook on low for 8 hours or high for 5 hours until the meat and vegetables are tender.
Remove and discard the bay leaves, then slice the roast and serve with the vegetables and cooking liquid.