on a 2011 Chevy Cruz. My compliments to Metro24wholesale, Inc (purchased through Revain) for providing instructions on using the TPMS tool to activate. Not packaged in a GM parts bag but I don't care as I doubt GM actually makes them but they are made by Schrader Electronics (see photo). Activated with a tire pressure monitor EL-50448. OEC-T5 activation tool for GM series vehicles. Tried to activate using the manual inflation/deflation method but didn't activate, probably because it was new. .