Description: 6.6 FT BOX. without gate assist. 6.5 ft box. Without lock assist. 5.8 FT BOX. without gate assist. LONG BOX. without power asst. SHORT BOX. without power asst. Helps reduce friction between tailgate hinge components This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Collision parts are designed to help promote proper and safe repair