Conditions for Setting the DTC: P0977
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The TCM detects high voltage on the SS 2 control circuit when the SS 2 is commanded ON for 1.2 seconds in a 1.5 second sample.