TRYING TO EASE FORWARD IN BUMPER-TO-BUMPER TRAFFIC, ACCELERATOR PEDAL IS RIGID. UPON PUTTING MORE PRESSURE, TRUCK LURCHED FORWARD HITTING ANOTHER VEHICLE'S BUMPER. I'VE NOTICED THIS MALFUNCTION SEVERAL TIMES DURING THE 3 YR. LEASE, BUT HAVE NEVER BEEN IN DANGEROUS SITUATION, THUS I HAVE NOT CONTACTED DEALER BEFORE THIS INCIDENT.*AK