GMC/CHEVROLET: ON SOME TRUCKS, VARIOUS DIAGNOSTIC TROUBLE CODES (DTCS) ARE DISPLAYED AND INSTRUMENT PANEL CLUSTER (IPC) WARNING LAMPS AND/OR MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATING DIESEL EXHAUST FLUID (DEF) AND ENGINE MAY CRANK, NOT START AND RUNS ROUGH OR MISFIRE. MODEL 2015 SILVERADO, SIERRA. *PE UPDATED 11/12/14. *PE
