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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1733 (Automatic Transmission - 6L45/6L50/6L80/6L90 - DTC P0218 To DTC P0974) >> DTC P0872 or P0873 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: You must perform the Circuit/System Verification first.
  1. Ignition OFF. Remove the Q8 control solenoid assembly. Refer to Control Valve Body Assembly Removal .
  2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
  3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.
  4. Connect the DT-47825-10:  jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve assembly electrical connector.
  5. Ignition ON, verify with a scan tool that each TFP switch parameter changes states when gently pushing on each TFP switch with the eraser end of a pencil.
    • If any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.
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