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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 583 (Automatic Transmission - 6T75 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> Transmission Fluid Cooler Flushing and Flow Test >> Flow Test

Flow Test

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Flow Test Procedure & Special Tools
    GM1810877Courtesy of GENERAL MOTORS CORP.
    NOTE: The Flow Test must be performed after the flush to ensure that all flushing solution and water is removed from the oil cooling system. Corrosion of the oil cooler will occur if water and flushing solution remain in the oil cooling system.
  1. Disconnect the hose from the oil cooler line. Connect the oil cooler feed line to the transmission for normal flow.
  2. Clip the discharge hose (1) to an empty oil container.
  3. Confirm the transmission is filled with automatic transmission fluid. Refer to Fluid Capacity Specifications for the correct automatic transmission fluid capacity.
  4. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 quarts) must be discharged during this 30 second run time.
  5. If the fluid flow meets or exceeds 1.9 L (2 quarts) in 30 seconds, connect the oil cooler return line to the transmission.
  6. If fluid flow is less than 1.9 L (2 qt) in 30 seconds, perform the following diagnosis:
    1. Disconnect the SA 9165T:  line flusher discharge hose (1) from the oil cooler return line.
    2. Disconnect the oil cooler feed line at the radiator.
    3. Connect the SA 9165T:  line flusher discharge hose (1) to the oil cooler feed line, radiator end.
    4. Clip the discharge hose (1) onto the oil drain container.
    5. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 qt) must be discharged during this 30 second run time.
  7. If the amount of transmission fluid flow remains less than 1.9 L (2 qt) in 30 seconds, inspect the oil cooler feed line for restrictions or damage. If no condition is found with the feed pipe, inspect the transmission.