What type antifreeze to use in 2000 Pontiac Bonneville?

The 2000 Pontiac Bonneville requires Dex-Cool antifreeze. Dex-Cool is a long-life antifreeze/coolant developed by General Motors specifically for their vehicles. It is a combination of ethylene glycol, water, and corrosion inhibitors, and it is designed to provide protection for up to 5 years or 150,000 miles. Dex-Cool is available in both a ready-to-use form and a concentrate that must be mixed with water before use. When mixing Dex-Cool with water, it is important to follow the manufacturer's instructions carefully to ensure that the proper concentration of antifreeze is maintained.