12L09 – Owner’s Guide Supplement Update – Spark Plug Gap Correction – 2013 Ford Mustang Shelby GT500

October 24, 2012 TO: All U.S. Ford and Lincoln Dealers SUBJECT: Special Field Action 12L09 Certain 2013 Model Year Mustang Shelby GT500 Vehicles Owner’s Guide Supplement Update – Spark Plug Gap Correction   AFFECTED VEHICLES Certain 2013 model year Mustang Shelby GT500 vehicles built at the Auto Alliance Assembly Plant from Job 1 through June … Read more