Conditions for Running the DTC

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.

Not other ECM or TCM DTCs are set.
Ignition voltage is 8.6 volts or greater.
The engine speed is greater than 400 RPM.
The engine run time is greater than 5 seconds.
High Side Driver (HSD) 1 is enabled.
Accelerator pedal position signal is valid
The TCM must receive a valid torque signal from the ECM.
Throttle position is 0.5 percent or greater.
Transmission fluid temperature (TFT) is -6.6°C (20°F) or greater.