Back Flush Procedure
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
If equipped with bypass valve, disconnect the oil cooler lines from the bypass valve.
- If equipped with bypass valve, connect the DT-45096-23 cooler flushing adapter (1) to the vehicle transmission oil cooler supply and return lines at the transmission.
If not equipped with the bypass valve, connect the DT-45096-30 cooler flush adapter (1) to the vehicle transmission oil cooler supply and return lines at the transmission.
Connect the black supply hose (1) to the return line, rear connector of the transmission, and the clear waste hose (2) to the feed line, front connector of the transmission, to the vehicle cooler lines. This is the reverse flow - back flush direction.
Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.
Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.