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Oil Cooler Flushing & Flow Check: Preparation

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. During the installation of the repaired or replacement transmission, DO NOT connect the oil cooler pipes.
  2. Remove the fill cap (9) on the transmission oil cooler line flusher and fill the flusher tank (4) with 20-21 oz. (0.6L) of flushing solution using the measuring cup (6). See Fig 1 . DO NOT overfill.
  3. Install the fill cap (9) on the flusher and pressurize the flusher tank (4) to 80-100 psi (550-700 kPa), using the shop air supply at the tank air valve (2).
  4. With the water supply valve (1) on the flusher in the OFF position, connect the water supply hose (7) from the flusher to the water supply at the faucet.
  5. Turn ON the water supply at the faucet.
Fig 1: Identifying Flushing Equipment
G00056982Courtesy of GENERAL MOTORS CORP.
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