SEVERAL TIMES WHEN I OR MY HUSBAND HAVE HIT THE BRAKES, THEY LOCK AND INSTEAD OF STOPPING THE CAR, IT CONTINUES TO SLIDE. I REPORTED THIS TO THE TECHNICIAN AT SILVEIRA PONTIAC AFTER THE FIRST ACCIDENT IN 1998. HE TOLD ME THAT WAS THE NATURE OF ABS BRAKES, I HAD A VAN BEFORE MY SUBURBAN THJAT HAD ABS BRAKES AND I /WE NEVER EXPERIENCED THIS PROBLEM. IN FEB. 1999 WE HAD THE BRAKES REDONE AT MARIN-PONTIAC-BUICK-GMC AND WE WERE HOPING THE PROBLEM WAS CORRECTED: HOWEVER IT WAS NOT AND IT RESULTED IN MY HAVING A SECOND ACCIDENT.( DOT NUMBER: UNKNOWN TIRE SIZE: 2457512R16 )