GM Genuine Parts Differential Lock Switches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. This switch, when activated, engages the vehicle's locking differential, which locks both wheels on an axle together to allow them to turn in unison. 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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• Engages the vehicle's locking differential, which locks both wheels on an axle together to allow them to turn in unison
• 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