Action Taken When the DTC Sets

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

The transmission control module (TCM) illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
The transmission will lock in NEUTRAL.
DTC P0877 is stored in TCM history.
The TCM freezes shift adapts.
The TCM inhibits torque converter clutch (TCC) engagement.