LIGHTING-HEADLIGHTS - WHILE DRIVING AT NIGHT, MY HEADLIGHTS (BOTH LOW AND HIGHBEAM) WILL GO OFF ALTOGETHER A FEW SECONDS AFTER I SWITCH TO MY HIGHBEAMS. AFTER EMERGENCY STOPPING DUE TO LACK OF VISION, IT COMES BACK ON AFTER SITTING A FEW MOMENTS ONLY TO HAPPEN AGAIN AND AGAIN. THIS IS A VERY SERIOUS DEFECT THAT ALMOST CAUSED A HEAD ON COLLISION AND MY FAMILY TO LOOSE OUR LIVES. 2) PARKING BRAKE - WHILE PARKED IN 4 WHEEL DRIVE, MOTOR OFF, ON A CLOSE TO FLAT SURFACE, MY BLAZER'S EMERGENCY BRAKE DISENGAGES AND MY VEHICLE HAS TO BE MOVED BACK INTO ITS PAKING PLACE. ELECTRICAL SYSTEM:BATTERY - BATTERY GOES DEAD IF I LEAVE MY DOOR OPEN FOR 10 MINUTES TO SWEEP OUT THE INSIDE. EVEN AFTER FACTORY BATTERY WAS REPLACED FOR THE SAME REASON. EXHAUSTE SYSTEM: CVS VALVE REPLACED SOON AFTER DRIVING OFF THE SHOWROOM FLOOR AT DEALERSHIP. BRAKE:HYDROLIC ANTI-LOCK BRAKE ASSEMBLY: UNABLE TO STOP VEHICLE WHILE IN 4 WHEEL DRIVE CAUSING A CRASH INTO GUARDRAIL IN ORDER TO GET STOPPED. BRAKES ALSO FAIL WHEN TRYING TO COME TO A STOP AND RUNNING OVER A BUMP IN THE ROAD...CAUSES BRAKES TO MAKE A CLICKING NOISE AND LOOSE BRAKING HOLD...HAVE TO REAPPLY FOR VEHICLES BRAKES TO WORK.