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BFL13's avatar
BFL13
Explorer II
Apr 24, 2019

ABS Comes and Goes Question-Update

Updated 15 May--

Hoping to get an idea from experts here what is likely happening before I give a garage an open-ended job order to find and fix it.

2003 Chev 2500HD 6.0 Gas. For the last while, the ABS lamp comes on sometimes if the back tires (not sure if just one side) go over a bump and also it happens at times during a sharp turn (mostly or always right turns) when the back end swerves. Can be at low speed in a parking lot even.

After a while with more driving (it varies how long), for no obvious reason, the lamp goes out until the next time. The bell alarm also happens as for when the ABS lamp comes on, so that works right.

I assume something is loose, but what? Thanks.

( I know the brakes still work with no ABS, so I am not worried about that )

13 Replies

  • Moisture can get behind the ABS sensor, and the resulting corrosion will push it out far enough to confuse the system.
  • Thanks, so that's one possible (will check mine for sure!) Any others?
  • I have a 2003 Workhorse W22 which is GM. I had that happening after checking all abs sensors and finding nothing wrong I discovered when brake fluid is low ABS and brake warning both come on. After checking brake lines and system I found a brake line fitting on right rear wheel seeping it must have been seeping for 2years master cylinder was low for rear brakes refilled, end of problem. Might be worth checking on yours