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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)BACK FLUSH
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Back Flush

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Back 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.
  1. Inspect the transmission oil cooler pipes for kinks or damage. Repair as necessary.
    2. Fig 1: Connecting J 35944 To Oil Cooler
    GM893800Courtesy of GENERAL MOTORS CORP.
  2. Connect the J 35944-A  to the oil cooler feed bottom connector. Use the J 35944-600  , if required.
  3. Clip the discharge hose (2) onto the oil drain container.
  4. Attach the J 35944-A  to the undercarriage of the vehicle with the hook provided and connect the flushing system feed supply hose (1) from the J 35944-A  to the top connector oil cooler return pipe. Use the J 35944-600  , if required.
  5. Turn the J 35944-A  water supply valve (3) to the ON position and allow water to flow through the oil cooler and pipes for 10 seconds to remove any remaining transmission fluid. If water does not flow through the oil cooler and pipes, the cause of the blockage must be diagnosed and the plugged component must be repaired or replaced. Continue with the cooler flushing and flow check procedure once the blockage is corrected.
  6. Turn the J 35944-A  water supply valve (3) to the OFF position and clip the discharge hose onto a 19 liter (5 gallon) pail with a lid, to avoid splashback.
    7. Fig 2: J 35944-A Water Supply Valve ON/OFF Positions
    GM893801Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.