Diagnostic Aids
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
This DTC may be set due to an overheating condition. The system is operating normally when the Trans. Fluid Temp. parameter is within 10°C (18°F) of the TCM temperature parameter.