ACDelco GM Original Equipment Engine Coolant Reservoirs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Reservoirs typically hold excess or an expansion of coolant and help maintain optimal operating temperatures in your vehicle's engine. If additional coolant is needed, it can be removed from the reservoir and circulated into the engine coolant system. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.

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• Helps maintain optimal engine operating temperatures
• Designed to contain excess or an expansion of coolant
• When needed, helps circulate more coolant into the coolant system
• Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
• ACDelco GM Original Equipment 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

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