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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1373 (Automatic Transmission - 6L80/6L90 - DTC P0218 To DTC P0963) >> DTC P0741 or P0742 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning in an attempt to clean or free up a potential sticking valve of dirt or debris.
  2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test to test for a stuck open or stuck closed TCC PC solenoid valve inside of the control solenoid (w/body and TCM) valve assembly.
    • If a stuck open or closed valve is found, replace the control solenoid (w/body and TCM) valve assembly.
  3. Inspect the lower control valve body for a stuck valve, debris or damage.
    • If you found a valve body concern, repair or replace the lower control valve body as necessary.
  4. Inspect the TCC control valve in the pump.
    • If you found a TCC control valve concern, repair or replace the TCC control valve or pump as necessary.
  5. Inspect the torque converter assembly for damage or discoloration.
    • If you found a torque converter assembly concern, replace the torque converter assembly as necessary.
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