Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

P0787

DTC P0787 is a Type B DTC.
The TCM inhibits 3-2 shift until vehicle speed is 20 km/h (12 mph) or less.
The TCM freezes transmission adaptive functions.

P0788

DTC P0788 is a Type B DTC.
The TCM freezes transmission adaptive functions.