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Username Post: Anti-lock "brakes" are trying to kill me.        (Topic#349516)
427_4speed 
Senior Member
Posts: 274
427_4speed
Reg: 01-31-03
02-05-18 02:00 PM - Post#2723445    

My anti-lock "brakes" are out to get me. On my 2001 Silverado. When i drive into my driveway on dry ground they will growl and I can't push the pedal! have almost hit the garage! backed out of my driveway and they growled again can't push the pedal and I shot out
into the street fortunately no one was coming. I removed the 60amp fuse under the hood, now my brakes work just fine but I have the Anti-lock light and the brake light on all the time Grrrr I had similar issues with my Impala! I hate Anti-locks. is there a way to disable them without all the warning lights? Or an fix?

If it ain't broke keep fixing it till it is! That's the Goverment way!


Edited by 427_4speed on 02-05-18 02:02 PM. Reason for edit: No reason given.

 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-05-18 02:18 PM - Post#2723448    
    In response to 427_4speed

In the salt states this was common and GM had a tsb referring to it. The front wheel speed sensors failed and at low speeds the abs actuated after getting false readings from one of the sensors. Fixed a bunch in my shop. Rust on the sensor mounting surface caused this. Tape over lite? Lol



Edited by Shepherd on 02-05-18 02:19 PM. Reason for edit: No reason given.

 
427_4speed 
Senior Member
Posts: 274
427_4speed
Reg: 01-31-03
02-05-18 02:22 PM - Post#2723449    
    In response to Shepherd

Black electrical tape or duct tape? LOL


If it ain't broke keep fixing it till it is! That's the Goverment way!


 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-05-18 03:49 PM - Post#2723458    
    In response to 427_4speed

Black, better blocker.



 
2plus2 
Member
Posts: 1126

Loc: Mission,BC
Reg: 02-03-05
02-05-18 04:24 PM - Post#2723461    
    In response to Shepherd

Leave the fuse in
Unplug the front wheel sensors
Then desolder the led from the cluster


69 Canadian Pontiac 2+2
factory L48 350 Chev,TH350,PW,PT
99 Silverado RCLB 4.8 NV4500 14BSF 4.10's locker 6" Procomp 35 bfg m/t's 9k winch cutout flares
07 Town Car Loaded,Tinted,Getting Bagged


 
454cid 
Valued Contributor
Posts: 2731
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
02-05-18 07:11 PM - Post#2723471    
    In response to 427_4speed

Do the GMT-800 trucks have a way to proportion the braking front to rear? On my GMT-400 it's handled by the ABS system. If I pull my fuse, the rears lock up super easy.

The normal fix for the problem is to replace the hubs and sensors..... sensors are replaceable, but often break off. That's what mine did.

99 K3500 RCLB


 
nickmac 
Frequent Contributor
Posts: 1111
nickmac
Loc: Tennessee
Reg: 02-13-07
02-06-18 05:21 PM - Post#2723568    
    In response to 454cid

I pulled my sensors and cleaned everything up and replaced everything. Haven't had any trouble since.

Dan
'16 Chevy Traverse 3.6 FWD
'04 Chevy K1500 Silverado 5.3 4x4


 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-06-18 05:49 PM - Post#2723574    
    In response to nickmac

I've fixed a few like that, cleaned up the rust on the mounting surface, but most have broken on the way out.



 
minitruck83 
Senior Member
Posts: 796

Age: 67
Loc: florida
Reg: 12-21-04
02-20-18 05:33 PM - Post#2725028    
    In response to 2plus2

Will unplugging the sensors cut out that dammed warning bell? I can live with the lights on, but that bell drives me crazy.

Pulling the fuse kills my speed control.

2003 1500 LT Burb.

I aint the man I used to be.... Never was.


 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-20-18 06:06 PM - Post#2725033    
    In response to minitruck83

Find the chime under the dash and unplug it.



 
minitruck83 
Senior Member
Posts: 796

Age: 67
Loc: florida
Reg: 12-21-04
02-20-18 10:14 PM - Post#2725055    
    In response to Shepherd

The chime is routed through the radio.

I aint the man I used to be.... Never was.


 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-21-18 07:26 AM - Post#2725090    
    In response to minitruck83

Yikes, didn't know that!



 
minitruck83 
Senior Member
Posts: 796

Age: 67
Loc: florida
Reg: 12-21-04
02-21-18 02:26 PM - Post#2725123    
    In response to Shepherd

Yeah, it really attracts unwanted attention in the Walmart lot!

Sensors (new) give me 348mV and 345mV when the hub is spun, sensor base on hub sanded and cleaned, all grounds checked, no mud in hub.
Guess I'm goinG to have to try unplugging the sensors and see what happens.

(or find a 10 yr old to reprogram it)

I aint the man I used to be.... Never was.


 
Shepherd 
Frequent Contributor
Posts: 1257

Loc: Lake George, NY
Reg: 11-11-15
02-21-18 06:44 PM - Post#2725134    
    In response to minitruck83

In my shop when we run into an owner who wants this issued pinned down, we get an abs scanner on it with a driver and co pilot we duplicate the condition and look closely at sensor inputs at low speed, we usually see one drop out at low speeds, this causes the abs to activate. Usually this is a front one that is bad.



 
wreckmech 
Member
Posts: 202

Loc: Parsippany, NJ
Reg: 10-08-02
02-22-18 03:08 PM - Post#2725249    
    In response to Shepherd

+1 on this. I have done many, and by the time I was done I ended up just changing out the wheel bearings. I know this seems like overkill, but I have never had someone come back after I installed Timken bearings.

I have had issues with different manufacturers wheel bearings, as well. This issue can be maddening until you get it figured out. Good luck...



 
someotherguy 
Moderator
Posts: 28656
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
02-22-18 04:06 PM - Post#2725257    
    In response to wreckmech

Should also be noted there's a TSB for ground issues near the ABS module. Check the frame rail near the module for this ground.

And as silly as it sounds, don't overlook your brake fluid level. If it's a little bit low it will chime like crazy and give you the vague SERVICE BRAKE SYSTEM error message, lighting up the dash, etc.

Normally I would not advise adding brake fluid unless circumstances required it like you just fixed a leak, bled the system, etc. because under normal operation when you go from new pads/shoes and a full master cylinder, the linings wear with use, the fluid level goes down. You leave it alone. Later when you do new pads/shoes the fluid level goes back up. If you had added any in the meantime, you'll likely now overflow the reservoir and make a mess.

Somehow recently I dealt with the fluid getting too low on my truck although the pads/shoes still have plenty of life left, and there are no leaks in the system. All I can guess is that it was marginally low to begin with from the previous owner and I just hadn't noticed. I got all the warnings and chimes and it turned out I was just a little low on fluid.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
minitruck83 
Senior Member
Posts: 796

Age: 67
Loc: florida
Reg: 12-21-04
02-22-18 05:16 PM - Post#2725268    
    In response to Shepherd

The problem comes and goes, when the light is on brakes work fine, but when the light is off the chime go's crazy. At 5 mph, the steering wheel will pull to the left (thinking that means the right side sensor is bad, but it reads close to 3.5V. when tested with a voltmeter while spinning the rotor.
I can see why some folks hate ABS, it can be dangerous!
grounds under the battery and the one on frame near the ABS pump are good, also one on rear of engine, there's a couple three more, but they shouldn't affect braking. Will check them anyway.

I aint the man I used to be.... Never was.


Edited by minitruck83 on 02-22-18 05:24 PM. Reason for edit: No reason given.

 
427_4speed 
Senior Member
Posts: 274
427_4speed
Reg: 01-31-03
02-27-18 09:43 AM - Post#2725833    
    In response to minitruck83

Pull the fuse under the hood. The fuse in the dash panel does kill the Cruise control.

If it ain't broke keep fixing it till it is! That's the Goverment way!


 
yooper1 
Contributor
Posts: 275
yooper1
Loc: U. P. of Michigan
Reg: 06-16-07
02-27-18 05:49 PM - Post#2725877    
    In response to 427_4speed

  • 427_4speed Said:
Pull the fuse under the hood. The fuse in the dash panel does kill the Cruise control.




Yes to this.

I did this on mine and it just kills the abs but keeps cruise and my brakes actually work.




 
Ryano 
Senior Member
Posts: 456
Ryano
Loc: St. Louis, Mo.
Reg: 11-28-04
04-26-18 06:01 PM - Post#2732306    
    In response to 427_4speed

I'm curious, because I have a similar problem like yours, didn't your computer throw a code?

My truck is older than yours (98 k1500) and it tells me that there is a open in the drivers side front speed sensor. code #co225.

Like you i tested with a meter on AC volts and it produced voltage, so its not the sensor or the sensors harness, that leaves the rest of the harness to the abs computer, or the abs computer itself.

What was the outcome of all this?




Ryano
49 Chevy Styleline
94 c1500
98 k1500


 
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