Draining Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine, fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at any time. Flammable antifreeze could cause a serious fire.
- Place a drain pan under the radiator drain cock.
- After the engine cools down, remove the radiator cap.
- Using a 1/4 inch drive, completely open the radiator drain cock.
- Allow the coolant to drain from the system until the flow stops.
- Place a drain pan under the heater hoses.
- Remove the large heater hose from the heater fitting.
- Allow the coolant to drain from the block until the flow stops. There may be more drainage from the radiator at this time.
- Install the heater hose.
- Close the radiator drain cock.