VERSATILE ENGINE COOLANT: This antifreeze + coolant is designed for use in all GM vehicles 1995 and newer requiring an orange organic acid technology (OAT) coolant. This item contains a bittering agent called Denatonium Benzoate. PROTECTS ENGINE: This antifreeze + coolant provides protection against rust and corrosion for all cooling system metals, including aluminum LONG-LASTING COOLANT: This antifreeze + coolant has a service life of up to 5 years/150,000 miles with a complete cooling system flush and fill BETTER FORMULA: Our antifreeze coolant solution is free of amines, phosphate, borate, nitrite and silicate EXCELLENT PERFORMANCE: This meets the performance requirements of ASTM D3306, D4985 and GMW3420, GM6277M Help keep your car engine in tip top shape with PEAK DEX-COOL Concentrate Antifreeze + Coolant. PEAK DEX-COOL Concentrate Antifreeze + Coolant is a GM-approved ethylene glycol based premium coolant that can be used in all GM vehicles 1995 and newer. This antifreeze is a factory-approved technology that contains a well-balanced mix of Organic Acid Technology (OAT) and corrosion inhibitors for complete protection of modern, high-performance GM vehicle engines. This item contains a bittering agent called Denatonium Benzoate. It is compatible for use with other extended-life coolants and is free of silicate, borate, phosphate, nitrite, and amines. Our antifreeze and coolant guarantees maximum cooling system performance for up to 5 years/150,000 miles*.