Car Problem Reports
Chevrolet Blazer ABS Front Wheel Speed Sensors May Fail
Chevrolet Blazer Problem
Average Mileage: 195,889 mi (132,000 mi - 255,667 mi)
Visitor, 1997 Chevrolet Blazer
abs light on & brakes act erratically
Visitor, 1999 Chevrolet Blazer, 200,000 mi
ABS warning light and ABS system kicking in randomly while braking right before a stop has been an ongoing problem since ~130000 miles. First time I've replaced the speed sensors on both front wheels, which solved it. I tell you, changing these sensors is not a walk in the park. It took me hours to do it, because of the difficculty of access to them. At the end of the following winter, same problem. Got tired of paying $60 a pop for each sensor and done some research. Found a publication from GM describing this problem, cause - rusty gasket that holds each sensor to a hub. Every time they rust out, the distance from the tip of the sensor to the gear inside the hub increases, causing erratic readings. I live in the "rust belt" and this made a lot of sense. Removed the sensors and voila, rusty gaskets. Replaced them with the ones I had laying around from the last time and problem solved.
That was a several years ago, but now that the vehicle just turned 200000, the problem is back. Rust never sleeps. I'm facing the choice if either buying the speed sensors again and spending $120-130 on parts or hunting for those gaskets. No one seems to be selling them without the speed sensors.
Visitor, 1999 Chevrolet Blazer, 132,000 mi
OBD CODE REPORTED PROBLEM WITH ABS SENSORS. ABS , (brakes), Operated erratically, (failed), in slick road conditions. 1999 Blazer, 4.3l 6 cyl.