Action Taken When the DTC Sets

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.

DTC P2728 is a Type B DTC.
DTCs P2729 and P2730 are Type A DTCs.
The transmission control module defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected.
The transmission control module commands maximum line pressure.
The transmission control module freezes transmission adaptive functions.