Forward Flush

Fig 1: Identifying Black Supply Hose And Clear Waste Hose

Courtesy of GENERAL MOTORS CORP.

Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses to provide a normal flow direction.

Fig 2: Setting Main Function Switch To FLUSH Position

Courtesy of GENERAL MOTORS CORP.

Turn the main function switch to the FLUSH position and allow the machine to operate for 30 seconds.