Power your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts 4.1L Engine. Engine long blocks are engine sub-assemblies that include many pre-matched components. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle.

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• 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