BUICK/CADILLAC/CHEVROLET/GMC: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOFTWARE PROBLEM FAILS TO WORK, AS INTENDED, IN AUTOMATIC CRASH RESPONSE SYSTEM AND MAY NOT MEET SEVERITY PARAMETERS FOR CRASH NOTIFICATION IN CERTAIN REAR END CRASHES. MODELS 2012 SRX; 2013 VERANO, CRUZE, EQUINOX, VOLT, TERRAIN. *PE UPDATED 11/28/12. *PE UPDATED 12/9/14. *PE
