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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 755 (AUTOMATIC TRANSMISSION, 4L60-E/4L65-E (TROUBLESHOOTING))TROUBLESHOOTINGAUTOMATIC TRANSMISSION OIL COOLER FLUSHING AND FLOW TEST (J 35944-A)FORWARD FLUSH
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Forward Flush

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Forward Flush
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Connecting J 35944 To Oil Cooler
    GM893800Courtesy of GENERAL MOTORS CORP.
  1. Disconnect both hoses (1 and 2) from the oil cooler pipes and connect them to the opposite oil cooler pipe. This will allow the oil cooler and pipes to be flushed in the normal flow direction.
  2. Repeat Step 6 and 7 of the Back Flush.
    3. Fig 2: J 35944-A Water Supply Valve ON/OFF Positions
    GM893801Courtesy of GENERAL MOTORS CORP.
  3. Release the trigger (1) of the J 35944-A  and allow water only to rinse the oil cooler and pipes for 1 minute.
  4. Turn the J 35944-A  water supply valve (3) to the OFF position and turn OFF the water supply at the faucet.
  5. Attach the shop air supply to the flushing system feed air valve (2) on the J 35944-A  and blow out the water from the oil cooler and pipes. Continue, until no water comes out of the discharge hose.
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