Pre-heat the smoker to 225°F and season the beef on all sides with the salt, pepper, onion, and garlic pepper.
Place directly on smoker rack and smoke until an internal temperature of 165°F. Spray the meat every hour minutes with water or beef broth to keep moist.
Once it reaches 165°F, remove the chuck roast from the smoker and place into an aluminum pan. Add the beef broth, onion, and carrots to the pan and cover. Place back on smoker.
Smoke another 3-4 hours or until extremely tender. Remove from smoker and serve with desired side dishes.
Notes
Use fresh cracked black pepper for the best flavor
Hickory and oak wood is best for smoking chuck roast
Place small potatoes in the pan with the carrots and onion for nice tender potatoes