GM Genuine Parts Engine Coolant Reservoir Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These reservoirs hold any excess or overflowing coolant within the cooling system. If a situation arises where the engine needs additional coolant they are utilized from this reservoir. 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 maintain optimal engine operating temperatures
• Designed to store heated coolant when pressures in the system rise and reintroduce it when cooled
• 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