Rub down the entire rib roast then liberally season with salt, Pepper, Garlic Seasoning
Set up you weber Kettle with 2 charcoal baskets on opposit ends of the kettle so that the roast will cook over indirect heat from both sides. Place a few chunks of wood in each charcoal basket to smolder. Aim for an grill temperature of about 300 degrees F.
Tie the rib roast with butchers twine every 3-4 inches to help hold the rib roast in place and cook evenly.
Run the spit rod through the center of the rib roast lenghtwise then secure with the stabilizer forks.
Place the spit rod into the rottiserie motor and make sure its secure before turning the motor on. Let the roast make a few rotations to make sure the motor is running smooth and the roast is secure.
Cook the Prime Rib for around 2 hours until you hit an internal temperature of about 125 degrees F.
take the roast of the pit and place on a few sheets of butcher paper or foil. Remove the spit rod and butchers twine. Rest for about 15 minutes before slicing.
Servings will vary depending on the size of your roast. I like to slice each steak into 12-14oz portions.