BUICK/CHEVROLET/GMC: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE ENGINE CONTROL MODULE (ECM) IS TO BE REPROGRAM, WITH NEW SOFTWARE UPDATE, TO ENHANCE THE WAY ENGINE OIL LIFE IS MONITORED. MODELS 2010-2012 EQUINOX, REGAL, TERRAIN, LACROSSE. *PE UPDATED 9/24/13. *PE
