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.

P0960

DTC P0960 is a Type A DTC.
Main Modulation/Line Pressure Control is disabled.

P0962 or P0963

DTCs P0962 and P0963 are Type A DTCs.
Main Modulation/Line Pressure Control is disabled or the transmission will lock into range.