GM Genuine Parts Locking Hubs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These hubs allow the front wheels to rotate freely when unlocked from the front axle. They are designed to engage (lock) onto the axle, or disengage (unlock) from the axle as needed for four-wheel drive. These components are also commonly called free wheeling hubs.GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

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• Allows wheels to rotate freely from front axle
• Enganges and disengages the wheel when four-wheel drive is turned on and off respectively
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
• GM regularly updates production and service part designs to integrate new materials and technologies