How to drain the Buick Regal water tank?

The concrete operation steps of discharging water from Buick Regal water tank are as follows:

First, press the start button to turn off the engine.

Second, let the engine stand until the water temperature becomes normal.

Third, open the driver's door.

Fourth, pull the flip switch in front.

Fifth, turn forward.

6. Slowly unscrew the lid of the small kettle to release the pressure of the cooling system.

Seven, disconnect the water tank along the pipeline and release antifreeze.