Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Engine idling at normal operating temperature, verify the scan tool Trans Fluid Temp. parameter is between -74 and +174°C (-101 and +345°F).
- If not within the specified range
Replace the Q8 control solenoid valve assembly.
- If within the specified range
- If not within the specified range
- Operate the vehicle at 64 km/h (40 mph) for 10 minutes. Monitor the Transmission Fluid Temperature parameter and the TCM Temperature parameter with a scan tool. The Transmission Fluid Temperature parameter should increase by more than 2°C (3.5°F). Also, the Transmission Fluid Temperature parameter and the TCM Temperature parameter should be within 10°C (18°F) of each other.
- If the Transmission Fluid Temperature parameter does not increase by more than 2°C (3.5°F) and the Transmission Fluid Temperature parameter is not within 10°C (18°F) of the TCM Temperature parameter
Then replace the Q8 control solenoid valve assembly.
- If the Transmission Fluid Temperature parameter does increase by more than 2°C (3.5°F) and the Transmission Fluid Temperature parameter is within 10°C (18°F) of the TCM Temperature parameter
- If the Transmission Fluid Temperature parameter does not increase by more than 2°C (3.5°F) and the Transmission Fluid Temperature parameter is not within 10°C (18°F) of the TCM Temperature parameter
- After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Refer to Testing for Intermittent Conditions and Poor Connections .