Draining

WARNING: As long as there is pressure in the cooling system, the temperature can be considerably higher than the boiling temperature of the solution in the radiator, without causing the solution to boil. Removal of the radiator cap while the engine is hot and the pressure is high will cause the solution to boil instantaneously and possibly with explosive force, spewing the solution over the engine, fenders, and person removing the cap. Under some conditions, the engine coolant is combustible.

CAUTION: When adding coolant, the manufacture recommends that you use GM Goodwrench DEX-COOL coolant If coolant other than DEX-COOL Is added to the system the engine coolant will require change sooner - at 50, 000km (30,000 miles) or 24 months.

1. Place a drain pan under the radiator drain cock.
2. Install a tube on the drain cock.
3. Place the end of the tube in the drain pan.

WARNING: The radiator cap should be removed from a cool engine only. If the radiator cap is removed from a hot cooling system, serious personal Injury may result.

4. Make sure the cooling system is cool. Then remove the radiator cap.
5. Open the drain cock completely.
6. Let the cooling system drain until the flow stops.
7. Place a drain pan under the engine.
8. Remove the drain plug from the engine block.
9. Let the engine block drain until the flow stops. There may be some more drainage from the radiator at this time.
10. Replace the engine block drain plug.
11. Close the radiator drain cock.