2008 GMC Acadia Q&A
2008 GMC Acadia Question: What is the size of the Brake Rotor Retention Nut on the rotors for 2008 Acadia?
The rotors are not held on by a nut. The rotors are floating, meaning they slide on and off and are held in place by the lug nut torque. The large nut you are referring to is the axle shaft nut. - Chevy Power