Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

P06AC

The difference between the TCM substrate temperature and the TCM power up temperature is greater than 8-10°C (14-18°F) depending on the average of the TFT, TCM substrate, and TCM power up temperatures.
The difference between the transmission fluid temperature (TFT) and TCM power up temperature is greater than 20-50°C (36-90°F), depending on the average of the TFT, TCM substrate, and TCM power up temperatures.
The above conditions have to be met for 5 minutes with a 7 minute period.

P06AD

The TCM power up temperature is -59°C (-74°F) or less for 1 minute.

P06AE

The TCM power up temperature is 164°C (328°F) or greater for 1 minute.