Back Flush Procedure

WARNING: This page is about a different variant/trim than selected.

Courtesy of GENERAL MOTORS CORP.

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.

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

Fig 2: Identifying Black Supply Hose & Clear Waste Hose
Courtesy of GENERAL MOTORS CORP.
Connect the black supply hose (1) to the return line, top connector of the transmission, and the clear waste hose (2) to the feed line, bottom connector of the transmission, to the vehicle cooler lines. This is the reverse flow - backflush direction.

Fig 3: Setting Main Function Switch To FLUSH Position
Courtesy of GENERAL MOTORS CORP.
Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.

Fig 4: Setting Main Function Switch To IDLE Position
Courtesy of GENERAL MOTORS CORP.
Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.