Forward Flush

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Identifying Black Supply Hose And Clear Waste Hose
Courtesy of GENERAL MOTORS CORP.

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.