Conditions for Setting the DTC: P0882
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
This DTC sets when the TCM detects battery B+ voltage below a threshold based on transmission fluid temperature. Threshold varies from 7.5 V for temperatures below -60°C (-76°F) to 9 V for temperatures above 20°C (68°F).