Adding Coolant

^ When adding coolant, it is important that you use GM Goodwrench DEX-COOL (orange-colored, silicant-free) coolant meeting GM Specification 6277M. If Silicate coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner - at 50,000 km (30,000 miles) or 24 months.