GM Genuine Parts Evaporative Emissions System Leak Detection Pump Filters are designed, engineered, and tested to rigorous standards, and are backed by General Motors.An evaporative leak detection system compares evaporative system pressure to atmospheric pressure. The system uses a port open to the exterior (ambient) air to get atmospheric pressure data. The Evaporative System Leak Detection Pump Filter helps prevent unwanted dirt and debris from entering the port.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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• Helps filter out dirt and debris from entering the fuel system
• Allows the atmospheric pressure port to measure atmospheric pressure while helping block dirt and debris from getting inside
• 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