Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. 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.
Place the gear selector in Reverse for 5 seconds and then idle vehicle for 5 seconds.
Observe the scan tool data parameter Shift Sol. 1 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.