Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0756 is a Type A DTC.
The TCM inhibits TAP function.
The TCM inhibits TCC.
The TCM freezes transmission adaptive functions.
The TCM commands high line pressure.
The transmission defaults to Park, Reverse, Neutral, or 2nd gear.