Key Identification and Usage
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 lock system used for this vehicle is a one key system with a key profile that has a two-sided cut and milled grooves that are unique to this lock system. The teeth of the key locate the tumblers and sidebar, flush to the outside of the lock cylinder from both sides of the cut.