VEHICLE HAD A FIRE STARTING IN THE DASHBOARD AREA BEHIND INSTRUMENT CLUSTER I THINK. IT TOOK LESS THAN 15 MINUTES FROM THE SMELL OF AND ISSUE TO FLAMES VISIBLE. I NOTICED THE GAUGES BECOMING ERRATIC THAN THE CHECK ENGINE LIGHT CAME ON WITH WHAT FELT LIKE THE 4 WHEEL DRIVE KICKING IN AND OUT FOLLOWED BY THE MOTOR RUNNING POORLY. I PULLED OVER, TURNED THE VEHICLE OFF AS THE SMOKE STARTED. THAN DIALED 911.. TROOPER WAS THERE IN 6 MINUTES WITH FIRE DEPARTMENT SHORTLY AFTER. I WAS ON A HIGHWAY TRAVELING ABOUT 70 MPH. THERE WERE QUITE A FEW POTHOLES AS THIS WAS WINTER TIME. LIGHTS WERE ON, CRUISE WAS ON, HEATED SEATS AND STEERING WHEEL WERE ON, RADIO WAS ON, PHONE AND LAPTOP WERE CHARGING ( LAPTOP UTILIZING 110 OUTLET IN TRUCK).