I had a 95 Camaro that kept having intermittent ABS problems. It would free wheel then the ABS would grab. Problem is it wasn't consistant and I kept getting my nose out into the intersections too far, or almost hitting someone in the rear and etc. I kept trying to tell my husband and it would never do it to him. Finally, one night he came home and told me how he almost ran over a guy at the local convenience store. THEN he believed me! I had the car to Hampton Chevrolet 3 times and they knew the car had the problem because it did it to them when they first pulled into the garage. Then they couldn't get it to do it again. I begged them to leave their diagnostic thingy on it and when it did it, I'd bring it right in. But, they wouldn't do it, and, kept calling me back up to pick up the car. After the 3rd try, I finally traded the car in for a Firebird. It is very frustrating to have to deal with these issues. I wish you the best of luck.