Question about 2000 Chevrolet Silverado

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The anti lock beaks turn on when at low speeds

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Most of the time when they do this is because theres different size tires on the different whells thier preety senstive to even different brands of tires that are the same size too as their not really the same. To check make a mark on the ground and amark on the tire thatmatches the ground rool the car forward till the mark lines up with the ground again. measure the marks do it with all of the tires. the ones that are different need changed, or just get a matched set of tires the other reason is almost the same the trie pressure needs to be right, and all the brakes have to work ( rear shoes wore out front pads glazed or worn down to the hard end ) If the ABS light doesn't come on except when it's working and shutts right back off and if you scan for codes your going to find the problem in tire sizes and or pressure and the measrement meathod will always find the bad boy. they all need to be inside of and inch in diameter ( the lenght of the marks or the floor or ground and measure twice if you get something odd.

Posted on Sep 17, 2010

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1 Answer

What does it mean when my anti-lock brake light comes on and the low traction light comes on and shuts off?


You need to have the ABS system scanned. You probably have a bad wheel speed sensor. most likely located in one of the hub bearings meaning; you may have to replace a hub wheel bearing assy with the faulty sensor. Traction control uses the same speed sensors as ABS. when the warning lights are on the system is not working.

Jan 21, 2016 | 1995 Chevrolet Lumina

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Anti-lock light is on and the low traction light turns on and off


you need to replace a anti lock sending unit or speed sensor

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When applying brake last bit before stopping judders like anti lock stuck


front wheel bearings going bad. this is common. the speed sensor is part of assembly. it will get real bad and you will have no brakes at low speeds, turning is worse. replace both front hubs. not cheap but will save headaches

Feb 27, 2011 | 2000 GMC Yukon XL

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My antilock brakes are activating at low speed stops 97 silverado K1500


From pads may be low causing the rear brakes to over brake and the anti-lock kicks in. Could be a sticking caliper piston and last the proportioning valve may need bleeding as it is offset.....

Feb 13, 2010 | 1999 Chevrolet Silverado 1500

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Anti-lock brakes engaging when not needed


sounds like you have a wheel speed sensor going out.. need to have it scanned to see which one is dropping out and making abs kick in..

Nov 30, 2009 | 1997 Chevrolet Tahoe

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Anti lock system activating why driving at low speeds


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Oct 29, 2009 | 2002 Buick Century

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2001 Chevy Silverado anti-lock brakes activate on dry pavement, the pedal pulsates, the typical anti-lock brake sound is heard, and the truck feels like it is not going to stop at times


One of the sensors has gone bad and needs to be replaced, the other thing to that would also do that is the ABS sensor is dirty or needs to be re gaped to the speed ring on the hub. There was a issue bulletin with your Tahoe on the ABS activating under 8 km/h. Good luck and hope this helps, if not clean out the sensor with brake parts cleaner and check the wire harness and ABS sensor bracket. Re gap the sensor to the speed ring hub. Here is the bulletin. Anti lock Brake (ABS) Activation at Low Speeds (Clean Wheel Speed Sensor Mounting Surface) #03-05-25-007C - (05/16/2006) 2001-2006 Chevrolet Suburban, Tahoe

Jun 05, 2009 | 2001 Chevrolet Tahoe

1 Answer

ABS brake module sounds like a motor running and won't stop unless battery is disconnected. what is fix?


I would pull the fuse for the ABS hydraulic pump and then put it back in and see what happens. Don't ever recall a pump running. Dealer may need to hook up scan tool for diagnostic fault codes, DTCs.



Principles of Operation
The ABS control module receives wheel speed readings from both front wheel speed sensors and the rear differential speed sensor, and processes this information to determine if an ABS event is necessary. The wheel speed sensor electrically senses each tooth of the ABS sensor indicators as it passes through the wheel speed sensor's magnetic field.
The ABS control module continuously monitors and compares the rotational speed of each wheel speed sensor indicator and, when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper(s). This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS control module returns the solenoid valves to their normal position, and normal (base) braking resumes.
The ABS control module is self-monitoring. When the ignition switch is turned to the RUN position, the ABS control module will do a preliminary electrical check, and at approximately 20 km/h (12 mph), the pump motor is turned on for approximately one-half second. Any malfunction of the ABS system will cause the ABS to shut off; normal power assisted braking, however, remains.
Inspection and Verification — Scan Tool Communications Check
  1. Verify the customer concern by carrying out the Drive Cycle Test.
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Parking brake cable
  • Tire pressure
  • Tire size or mismatched tires
  • Blown fuse
  • Central junction box (CJB):
    • fuse 23 (10A)
  • Battery junction box
    • fuse 102 (50A)
  • Connectors or connections
  • Ground integrity
  • Harness routing
  • Wire chafing
  • Circuitry open/shorted

-----------------------------------------------------------------------
Anti-Lock Control The four-wheel anti-lock brake system (4WABS) consists of the following components:
  • Anti-lock brake control module (2C265)
  • Front anti-lock brake sensor (2C204)
  • Front anti-lock brake sensor indicator (2C182)
  • Hydraulic control unit (2C219)
  • Rear anti-lock brake sensor (2C190)
  • Rear anti-lock brake sensor indicator (2C189)
  • Yellow ABS warning indicator

May 07, 2009 | 2000 Ford Expedition

1 Answer

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.
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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.

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    Please report back, I am curious if that is what it is. Good luck

    Mar 03, 2009 | 2003 Ford Explorer

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