Conditions for Setting the DTC: P2728
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 5 control circuit when the actual pressure does not equal the commanded pressure for 5 seconds.