Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle in Park for 5 seconds.
Observe the scan tool data parameter Line PC Sol. CKT Status, the parameter should display OK.
- If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
- If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.