1999 Chevrolet Silverado 1500 Logo

Related Topics:

Posted on Oct 22, 2017
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

Have the same abs problem with my 1998 silver ado z71 as many have stated before. Mine will lock the back wheels at slow speeds. The abs dash light is on and seems that both front sensors are reading an acceptable voltage approx. .7 volts. Any ideas on what else in the system could be the culprit?? Any information would be greatly appreciated

  • Anonymous Jan 04, 2012

    Sounds like your proportioning valve may be going out

  • Anonymous Jan 04, 2012

    Have you scanned for codes on the ABS?

×

1 Answer

Bill Boyd

Level 3:

An expert who has achieved level 3 by getting 1000 points

Top Expert:

An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

  • Chevrolet Master 53,816 Answers
  • Posted on Oct 22, 2017
Bill Boyd
Chevrolet Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Top Expert:

An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

Joined: Jan 04, 2013
Answers
53816
Questions
7
Helped
11944912
Points
172802

Abs systems do not lock on the brakes
they release the brakes when the wheels stop spinning and when the wheels start turning again apply the same brake pressure as before the wheels stopped spinning
check the proportioning valve to the rear brakes to ensure that it is not acting as a one way valve and that is causing the problems
if the compensating port in the master cylinder for the rear wheels is blocked that also will lock the rear brakes

5 Related Answers

Anonymous

  • 1010 Answers
  • Posted on Jun 25, 2008

SOURCE: ABS BRakes

Check the brake light switch at the pedal. However an overheated/melted bulb base means arcing to me. So, BOTH sockets are probably slightly corroded & rusted. You fix that by scraping the terminals inside the socket with a pocket knife or screwdriver. Clean with alcohol or contact cleaner. If the new bulb isn't tight, and can be moved back and forth by hand, bend the contacts inward slightly, but don't snap them, they are spring steel. I was wondering when somebody would ask this question. I fix them at least to once a month - not the same car, but all GM's, and when fixed, they're good. Use logic if centre safety/brake light works.

The remote start sounds normal. There are many different types and they are quirky.

You should scan for codes with an OBD II scanner. If the problem was in the brake light connections or is fixed at the pedal, erase codes. It could be, by coincidence, and in no relation whatsoever to this problem, that a front wheel bearing sensor has gone - they do that, and require a new hub assembly.

Ad

Anonymous

  • 59 Answers
  • Posted on Sep 20, 2008

SOURCE: 2002 2WD CHEVY TAHOE ABS

Its possible that right wheel speed sensor is dropping out early making the truck think that wheel is locking up. That will activate the ABS and let the brake go on the right wheel which will make the vehicle pull slightly left. The only way to know for sure is to watch the wheel speeds on a scanner and see which one is drpping out first and replacing that speed sensor/bearing assembly.

good Luck

Anonymous

  • 1450 Answers
  • Posted on Nov 11, 2008

SOURCE: 2005 Impala abs & traction control problem

The traction control works off of the abs.So when abs has problem traction is disabled. If problem started when brakes changed most likely one of these sensors. Check rear wiring and see if you can see any physical damage.

Anonymous

  • 2004 Answers
  • Posted on Sep 08, 2009

SOURCE: abs and t/c lights are

When there is such a feeling, it is the brakes that needs total replacement.

Also you might have to check the master brakes for any leaks. And you need to check the bushing rubbers on the steering rack too.

Be careful and fix this on time.

Rate this solution.

Anonymous

  • 1752 Answers
  • Posted on Oct 15, 2009

SOURCE: abs kicks in at low speed trying to stop. Replaced

Check the speed sensors at each wheel. http://www.ehow.com/how_4521137_replace-abs-wheel-sensor-chevy.html

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
3answers

How to turn off ABS light on a 1998 GMC pickup

Check brakes pads/disc & check abs wirings
0helpful
2answers

ABS light on dash is stuck on how do I get it off on a 95 Ford Explorer Eddie Bauer edition

Unhook the negative battery cable for a couple of hours, then reconnect. If the code comes back, you may have a bad abs wheel sensor.
0helpful
1answer

Abs

sounds like the anti lock pump is gloing out
2helpful
1answer

06 pontiac torrent abs coming on just before stop position at very slow speed

Sounds like there is a problem with one of the wheel speed sensors on your vehical, look under your car where the axle and hub meet make sure the trigger wheel for the abs sensor is free if dirt or mud buildup, if the trigger wheel is dirty the sensor wont be able to calculate wheel speed thus throwing on your abs light on your dash, if the trigger wheels on all 4 wheels are clean and free of road debrise you will need to get the computer scanned to find out which wheel sensor is malfunctioning on which wheel and further diagnose it from there...
0helpful
1answer

Abs active light on, brakes pulsate when tapped. what's that mean?

The ABS Active monitor comes on when one or more of the wheels are not spinning at the same rate of speed. The ABS system determines wheel "lock up" from the wheel speed sensors and will adjust brake pressure to unlock the skidding wheel(s). It achieves this operation with a pump which will rapidly pump the brakes to the specified wheel. I'm assuming this is the "pulsation" you are experiencing. If you are having this problem under light to moderate braking, be sure to have the proper size tires on all 4 wheels. Incorrect tire sizes and uneven tire wear will give improper wheel speed information the the ABS controller. This will result in a malfunction of the system.
1helpful
1answer

My anit-lock light come's on and then when i take off it drags

What is dragging, the car? The ABS sensors are in the wheel bearings, if a bearing is going bad, the car will make a humming sound that gets louder with speed, they could set off the ABS light. Also, a stuck brake caliper could make a similar but usually louder sound, and the resulting slow wheel could set off the ABS alarm.

Lift the front end and spin the wheels, one will sound like its dragging. Take it off and then look at the rotor and pads. The rotor should be nice and silver, not bluish black, indicating overheating. If they're fine, it's probably a wheel bearing. You can do that yourself, but it requires a LARGE socket (most are somewhere around 1&7/16 and require a 3/4 inch socketwrench) so you may just want to have it done at a shop.
0helpful
1answer

Have 1998 Olds Bravada. Replaced a broken ABS

If the smarttrack light is on, trouble codes are stored. That's your starting point.
2helpful
1answer

How to reset abs dash light on 2003 dodge caravan

Is your Trac Off Light also on? If so this could be one more area to check. These are integrated and can affect each other. If the wheel speed sensors are bad (and they do fail more than reported) The will need to be removed, cleaned, checked and re-installed or replaced. The ABS Light will come on if the wheel speed sensors are malfunctioning.
IF NO Trac Off Light:
On my 2002, I removed the battery, battery tray, and access the ABS system located just below the master cylinder. It should have several brake lines going into a metal portion, along with a black plastic box like electrical panel connections. I remove the electrical connection (to the right side) Use a mirror to see the whole set up from behind to remove the electrical connection. There are 4-bolts holding the black body panel onto the silver body. Remove these bolts.
There should be holes in the black box panel you are detaching, and silver rod shaped that insert/go into these holes left on the metal box.
I had to only clean and lubricate the holes and rods, as they had become dirty and corroded with oxidation. After cleaning, I re-attached, replugged the connection and checked operation. The ABS light went out and the ABS was checked and everything worked fine.
If you do this and the light does not go out, then you could have a problem with the wheel sensors or the ABS Actuator itself. In most cases that you take it to a garage/mechanic, they will cite the ABS system that has to be replaced and that may not be the necessary case. Mine just needed the holes and rods to be cleaned.
Let me know if this helped and if you have additional information or questions. Feel free to contact me at FixYa.com!

0helpful
1answer

1998 Olds 88, Replaced all the brake lines (because of corosion) I took care to get lines back on anti-lock unit in same position as origonal. Brake light on dash did go out but the ABS and Traction...

you probably push air into the ABS unit when getting your lines replace but the Traction Control light might be on because the system might use the wheel speed sensor on the ABS unit to enable the Traction Control.......
0helpful
1answer

Problem with my cruise control and ABS light on 03 Explorer

Anti-Lock Control —Vehicles Built After 03/2002 The 3-channel anti-lock brake system consists of the following components:
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • Anti-lock brake control module (ECU)
  • rear wheel speed sensor
  • rear wheel speed sensor rings
  • yellow anti-lock brake warning indicator
The 4-channel anti-lock brake system with traction control and stability assist system consists of the following components:
  • active brake booster with integral solenoid
  • brake booster release switch
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • stability assist module (ECU)
  • stability assist event indicator
  • lateral accelerometer
  • longitudinal accelerometer (4x4)
  • rear wheel speed sensors
  • rear wheel speed sensor rings
  • steering wheel position sensor
  • yaw rate sensor
  • yellow anti-lock brake warning indicator
  • brake pressure transducer
  • traction control switch
---------------------------------------------------------------------
I suspect the abs issue is causing the speed control not to work if it happened at the same time the cruise control stopped working. When the yellow ABS light comes on, it means the ABS is dactivated. You may have a faulty accelerometer which senses acceleration and yaw (side to side lean). I have not seen a bad one but you said it is sensitive to acceleration.
I would unplug it and see what happens. The connector should have a small tab to depress so you can pull the connector out.
Here is where it is:

Accelerometer Removal and Installation
  1. NOTE: The accelerometer is located under the center, rear passenger seat carpet. (I think you have to remove seat for access).
    Cut the carpeting along the perforations.
  1. Disconnect the electrical connector.
  1. Remove the nuts and remove the accelerometer.
cd31596.gif
Have dealer hook up tester and pull fault codes if you can't find an easy solution.
Some background info
  • A malfunction in the anti-lock brake system will cause the anti-lock brake control module to shut off or inhibit the system. However, normal power-assisted braking remains.
  • Malfunctions are indicated by the yellow ABS warning indicator in the instrument cluster.
  • The anti-lock brake system is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will carry out a preliminary self-check on the anti-lock electrical system indicated by a three-second illumination of the yellow ABS warning indicator in the instrument cluster.
  • During vehicle operation, including normal and anti-lock braking, the anti-lock brake control module monitors all electrical anti-lock functions and some hydraulic operations.
  • Each time the vehicle is driven, as soon as vehicle speed reaches approximately 20 km/h (12mph), the anti-lock brake control module turns on the pump motor for approximately one-half second. At this time, a mechanical noise may be heard. This is a normal function of the self-check by the anti-lock brake control module.
  • Pedal pulsation coupled with noise while braking on loose gravel, bumps, wet or snowy roads is normal and indicates correct functioning of the anti-lock brake system.
  • Warning Lamp Indicator
    The anti-lock brake system (ABS) uses the yellow ABS warning indicator to alert the driver of a malfunctions in the ABS.
    The yellow ABS warning indicator will come on to warn the driver that the ABS has been turned off due to a symptom that exists in the ABS. Normal power assist braking remains but wheels can lock during a panic stop while the yellow ABS warning indicator is illuminated.

    -----------------------------------------
    Please report back, I am curious if that is what it is. Good luck
    Not finding what you are looking for?

    161 views

    Ask a Question

    Usually answered in minutes!

    Top Chevrolet Experts

    ZJ Limited
    ZJ Limited

    Level 3 Expert

    17989 Answers

    john h

    Level 3 Expert

    29494 Answers

    Thomas Perkins
    Thomas Perkins

    Level 3 Expert

    15088 Answers

    Are you a Chevrolet Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides

    Loading...