Cooling System Bleeding

WARNING: Under some conditions, the ethylene glycol engine coolant is combustible. In order to help avoid being burned, do not spill the antifreeze or the coolant on the exhaust system or the hot engine parts. Do not remove the radiator cap when the radiator is warm. Removing the cap immediately lowers the boiling point of the coolant, and could cause a violent overflow, resulting in a large coolant loss and personal injury.

CAUTION: Alcohol, methanol-based coolants or plain water alone should not be used in the cooling system at any time. Damage to the cooling system could result from their use.

NOTE: Maintain the cooling system protection at -33°F (-36°C). This temperature will prevent corrosion and loss of coolant from boiling. Maintain this level of protection even if extreme temperatures are not expected. The cooling system is filled (by the manufacturer) using a coolant that is a 50/50 mixture of water and ethylene glycol antifreeze. This coolant solution provides freezing protection to -33°F (-36°C). Add ethylene glycol-based coolant to the coolant reservoir when the coolant level is low.

Remove the radiator cap. Ensure the radiator drain plug is closed. Fill the cooling system with water. Using a 50/50 mixture of Ethylene Glycol Coolant (GM P/N 1052753), or equivalent and water, fill the radiator to the base of the radiator filler neck. Fill the coolant reservoir to the FULL mark on the reservoir.
Start and run the engine until the coolant is at operating temperature. The coolant is at operating temperature when the following conditions exist: The hoses feel warm and the coolant is moving in the radiator. Add coolant to the radiator until the coolant level reaches the radiator filler neck. Install the radiator cap.