TT: REFER TO THE CHART BELOW FOR A COMPREHENSIVE LIST OF THE CURRENT AND PREVIOUSLY ISSUED USB SSTS AND THEIR APPLICABILITY. THIS IS ONLY A REFERENCE LIST OF TOOLS THAT MIGHT BE IN DEALERSHIP INVENTORY AND NOT MEANT TO BE A DIAGNOSTIC OR REPAIR PROCEDURE. GENERATION 7 NAVIGATION SYSTEMS USE A USB SST TO UPDATE FIRMWARE AND MAP. GENERATION 8 NAVIGATION SYSTEMS USE A USB STICK TO UPDATE THE FIRMWARE ONLY.