Two problems related to brake sensor have been reported for the 1999 Chevrolet Blazer. The most recently reported issues are listed below.
While driving down the road approaching a stop light my wife tried to stop and the brakes just made that abs buzzing noise and was not stopping. This was caused by the wheel bearing abs sensor being bad not the wheel bearing itself this should not be able to happen as it is a danger/accident waiting to happen!.
I reported my defect (headlights & dash lights dimmed ) to gmac, within 3 mo of my purchase, I wasn't sure I what I was seeing at first. I was told by gmac to take my Blazer to whitlow Chevrolet (804-323-7600), they kept my Blazer for 2 days. They said they could not reproduce my problem. I was told by the service writer, they would inform me of any bulletins that might be related to my problem. I mentioned I heard the 1999 corvette had the same problem, he said it was not related at all. I change my oil every 3,000mi and every time I visited whitlow I would ask the question about my problem, the response was "no". I took a trip to indiania on I-70, I was driving the posted speed limit, so was the driver in front of me. My lights dimmed and the driver in front of me got behind me and flashed his lights for several miles. I thought I was going to be a victim. Asap, I called gmac , they listen to my problem again referred me to ratley Chevrolet (540-898-4000). My first visit was interesting, they knew my about my problem. Inorder for my extended warranty to cover the work, they needed to prove my problem. They kept my Blazer overnite, put it on their computer, found my problem a faulty abs sensors ,and computer modual causing the abs motor to turn itself on/off ,dimming my headlights & dash lights. To my surprise I was told Chevrolet could not fix my problem because the abs computer modual and sensors were defective. So I'm still driving Blazer, less at night. My concern is if the abs motor is contantly running on/off, what is the lifetime of the abs motor, I'm sure it was not designed for a constant on/off life cycle, my question to you and chverolet, will my abs, work when I really need them, too. I am turning to you for help. Thanks in advance, richard hillard.