2006 CTS. WHILE IN BUMPER TO BUMPER TRAFFIC I FELT THE CAR "HYDROPLANE" FOR A SECOND. IT WASN'T RAINING AND I SAW NOTHING IN THE REAR VIEW MIRROR TO CAUSE IT. I CONTINUED ON AT ABOUT 30MPH AND BEGAN TO DEPRESS THE BRAKE SLOWLY AS A RED LIGHT WAS AHEAD. THE BRAKES DID NOT ENGAGE AND I PLOWED INTO THE CAR IN FRONT OF ME. CADILLAC REPAIR CAN FIND NOTHING WRONG. NOW I'M FRIGHTENED TO DRIVE THE CAR AGAIN. SOMETHING HAS TO BE WRONG YET I CAN GET NO ASSISTANCE. *TR