Conditions for Setting the DTC: P2719
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 4 control circuit when the actual 1-3 clutch pressure does not equal the commanded 1-3 clutch pressure for 5 seconds.