IMPORTANT – Please Read Fit Notes Below. Engine Oil Filter Adapter. 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. Engine Oil Filter Adapter — New. 3.5L V6 LZE VIN: K. 3.5L V6 LZ4 VIN: N. 3.9L V6 LZ9 VIN: 1.