Preheat a smoker to 275 degrees F (135 degrees C).
Combine salt
pepper
garlic powder
and steak seasoning in a bowl. Rub mixture evenly over the roast and place in a baking pan.
Cook roast in the smoker until meat reaches an internal temperature of 165 degrees F (74 degrees C)
4 to 4 1/2 hours. Wrap roast in aluminum foil and continue smoking until meat reaches an internal temperature of 195 degrees F (90 degrees C)
about 1 hour more.
Remove roast from smoker and let sit for 20 minutes. Leave smoker on.
Cut meat into cubes and return to the baking dish. Add barbeque sauce and brown sugar.
Smoke meat for 1 1/2 to 2 hours more.