FIAT CHRYSLER: TSB HAS AN OWNER NOTIFICATION LETTER. SELECT DOCUMENT SEARCH BUTTON BELOW. WHEN SHIFTING OUT OF CURRENT SELECTED MODE, FINAL DRIVE CONTROL MODULE (FDCM) SOFTWARE CAUSES SERVICE 4WD LIGHT TO ILLUMINATE AND SWITCHING OUT OF 4WD FAILS AND NEEDS REPROGRAMMING. MODEL 2005-2010 JEEP GRAND CHEROKEE, JEEP COMMANDER. *PE
