1999 Chevrolet Suburban Braking ABS System Activates Just Before Stopping More

1999 CHEVROLET SUBURBAN
230,000 MILES
Avatar
DAVID BEACH
  • MEMBER
  • 1 POST
When braking the abs system activates just before stopping. More severely when turning. The front wheel bearings are about due to be changed. Will bad bearings affect the speed sensors? Or is my problem in the abs system only? How do I fix it?
Nov 28, 2012 at 1:39 PM
Advertisement
Avatar
CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
False activation is real common on GM products. In the case of your vehicle rust has built up between the wheel speed sensors and wheel bearings. Those sensors don't put out much of a signal to begin with, and when rust pushes the sensors further away, the signal goes even lower. That causes them to drop out at low speeds making the ABS Computer think that wheel is locking up. Have the abs system and brakes checked, abs system will need to be scanned for codes.
Nov 28, 2012 at 7:53 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.