2000 Silverado ABS recalls, help ????

[ibbillyg]

Has there been a recall for anti lock brake issues like this for the 2001 silverado? Mine is doing the exact same thing.

[j cAT]

Originally Posted by ibbillyg

Has there been a recall for anti lock brake issues like this for the 2001 silverado? Mine is doing the exact same thing.

how many miles on this vehicle ? what issues do you have with the braking ?

[ibbillyg]

163,000. brakes will make a moaning noise, brake pad will be completely compressed and truck will move forward another 3 - 4 feet before catching and stopping. Only happens just before complete stop.

[j cAT]

Originally Posted by ibbillyg

163,000. brakes will make a moaning noise, brake pad will be completely compressed and truck will move forward another 3 - 4 feet before catching and stopping. Only happens just before complete stop.

since your over 120,ooomi I doubt you would get anything from GM.

the ABS recall was for failure of the front hub speed sensors to properly report the correct speed when the vehicle was moving under 5-10 mph.

the hubs rust up badly so much so the cheap plastic sensor gets pushed out of the hub slightly this reduces the pick up voltage to the PCM/comuputer..the the brakes will not stopthe vehicle because the ABS module will cause the brakes to pulsate rapidly.


your issue is items like calipers including the slide pins,brakes setting too tight in the caliper, rotors excessively rusted/worn..

make sure the rear brakes are also checked.

open bleed screw then push back calipers fully so that the cal piston fluid is removed.

[ibbillyg]

thanks. I did have to replace a brake lining and did bleed all brakes. It has not been used in a long while and the rotors are very rusted. Will get at it in a couple weeks. Peace

[j cAT]

Originally Posted by ibbillyg

thanks. I did have to replace a brake lining and did bleed all brakes. It has not been used in a long while and the rotors are very rusted. Will get at it in a couple weeks. Peace

if the rotors have surface rust only , sand the rotor surface with 120 grit sand paper in a rotational direction. then wipe down the surface with mineral spirits. If pads are good sand those as well and clean same as the rotors. then make sure the calipers slide and the piston is not binding,,,.

good luck ..

[ibbillyg]

thanks, will do

[Maimus]

Hello every one,
I have problem with my 2005 Chevy express van. Looks like similar problem that all have it. I replaced wheel sensor but it didn't help. Here is what my mechanics said when I asked him to help me. "you have to go to dealership we can't fix it. Here is info from your van computer Code CO 131 ABS/TCS System. What is that mean?
Thanks for any ideas.

[j cAT]

Originally Posted by Maimus

Hello every one,
I have problem with my 2005 Chevy express van. Looks like similar problem that all have it. I replaced wheel sensor but it didn't help. Here is what my mechanics said when I asked him to help me. "you have to go to dealership we can't fix it. Here is info from your van computer Code CO 131 ABS/TCS System. What is that mean?
Thanks for any ideas.

what is needed is the vehicle details. also the issues you are having with the ABS.

your CO 131 DTC code is not valid as far as I can determine.

I have worked theis abs on the silverado and have had good results.

replacing the speed sensor in most cases is not the cause of ABS issues.the sensor only fails if the wires get damaged or the tech has to use excessive force to remove from the hub.

measuring the voltage of the sensor output is what is needed when determining whats going on , also the bearing assy condition etc. thats if this is the cause of your problem whivch you say is what most have with this.

the wheel hubs rusting out internal and external causes most ABS failures not the sensor itself.

[j cAT]

Originally Posted by Maimus

Hello every one,
I have problem with my 2005 Chevy express van. Looks like similar problem that all have it. I replaced wheel sensor but it didn't help. Here is what my mechanics said when I asked him to help me. "you have to go to dealership we can't fix it. Here is info from your van computer Code CO 131 ABS/TCS System. What is that mean?
Thanks for any ideas.

if you have drum brakes and the drums are over 50,ooo mi on them your drums are worn to much. this causes the front brakes to do all the braking this will cause an inbalence in the breaking effort .

asbestos brake shoes are no longer used . therefore the drums only last on these large heavy vehicles about 40,ooomi.

WHEN THE TOP OF THE SHOE IS ONLY WORN THE DRUM IS N/G.........
IF THE DRUM HAS A GOOD SIZED RIDE ALONG THE EDGE MAKING IT DIFFICULT TO REMOVE THIS IS SAYING TOO WORN ALSO !

[gmtech1]

The C0131 is for the master cylinder pressure sensor, it is located inside the BPMV. They are difficult to diagnose because the EBCM and BPMV are bolted together, a scanner is required check readings. You can seperate the two and inspect the connector. This code can get expensive in a hurry to repair if both the EBCM and BPMV need replaced.

[Maimus]

Here is my whole story, see if you can make any sense of it.
What was happenning first was:
1.when I start accelerate from traffic light with out pushing hard just about 5-7 mph my traction control light starts blinking and I loosing my accelerator complitly. And plus you can hear like ABS working (or some thing sounds like ABS).I can push as much or as hard as I can but van just will coast till its stops. So it can be pretty dangerous on a big intersections. So I find out if I press brake pedal fast and drop speed after that I can keep going.
2. So I went to mechanic and he told me that it's wheel abs sensor, so I order it whole assembly(hub and sensor).
3. While I was waiting for the part Traction Light came on and stays on all the time now. I replace hub/sensor but it didn't helped.
4. I'm back at the shop this time he told me this
code CO 131ABS/TCS System Master cyl. pressure sensor.
Internal fault yaw rate sensor P/N 15220053
EBCM calibration poss cause.

Here we go,that is all I have.

Answers:

I don't have drum brakes, disks all around.

2005 Chevy Express 6.0L V8

Where are this EBCM unit?

Thank you every body for your time.

[j cAT]

Originally Posted by Maimus

Here is my whole story, see if you can make any sense of it.
What was happenning first was:
1.when I start accelerate from traffic light with out pushing hard just about 5-7 mph my traction control light starts blinking and I loosing my accelerator complitly. And plus you can hear like ABS working (or some thing sounds like ABS).I can push as much or as hard as I can but van just will coast till its stops. So it can be pretty dangerous on a big intersections. So I find out if I press brake pedal fast and drop speed after that I can keep going.
2. So I went to mechanic and he told me that it's wheel abs sensor, so I order it whole assembly(hub and sensor).
3. While I was waiting for the part Traction Light came on and stays on all the time now. I replace hub/sensor but it didn't helped.
4. I'm back at the shop this time he told me this
code CO 131ABS/TCS System Master cyl. pressure sensor.
Internal fault yaw rate sensor P/N 15220053
EBCM calibration poss cause.

Here we go,that is all I have.

Answers:

I don't have drum brakes, disks all around.

2005 Chevy Express 6.0L V8

Where are this EBCM unit?

Thank you every body for your time.

after the forum member brought out the code explaination I did some checking on this . It seems that some of these master cylinder sensors are defective. this will cause the code you got and cause your issues as explained by those that had your issue. it is possible that this may be other components but the sensor is cheap. there is a test method of this sensor. however with intermittent problems this can be hard to duplicate . I would try the master cyl sensor.

this posting was started for silverado hub rust/sensor /abs defects. your system is different you have traction control .

the rear drums on your vehicle are a problem when you notice poor braking effort and distorted front rotors. drums don't last .

[gremlin96]

this is what i have found out. simple sand on the road for traction in the winter time has magnetite in it. this will stick to the wheel and send the sensor nuts. i can drive for miles with out hitting the brakes. works good until i hit a town with a stop light. and then the brakes do not work right and i run a stop light. when i am running down the road in slush and snow is the sand sticks in the groves for the sensor. the first time it happened to me i was kinda lucky. a cop seen me and he wanted to know exactly why he had the same problem. off to the dealer we headed. there fix was to go to the wash rack clean off the groves and it worked.
the dealer even told me not to drive the truck off road or on heavy muddy gravle roads or i will need to spray out the wheels as soon as i hit the pavement. we have a lot of mines and sand around, so even on the pavement i am picking up the magnetite, even in the summer time.

[j cAT]

Originally Posted by gremlin96

this is what i have found out. simple sand on the road for traction in the winter time has magnetite in it. this will stick to the wheel and send the sensor nuts. i can drive for miles with out hitting the brakes. works good until i hit a town with a stop light. and then the brakes do not work right and i run a stop light. when i am running down the road in slush and snow is the sand sticks in the groves for the sensor. the first time it happened to me i was kinda lucky. a cop seen me and he wanted to know exactly why he had the same problem. off to the dealer we headed. there fix was to go to the wash rack clean off the groves and it worked.
the dealer even told me not to drive the truck off road or on heavy muddy gravle roads or i will need to spray out the wheels as soon as i hit the pavement. we have a lot of mines and sand around, so even on the pavement i am picking up the magnetite, even in the summer time.

if the tires pick up MUD that sticks to the tread this will cause the tires to slip when braking or starting out.

the 2000 silverado sensors are well protected from this type of exposure. on earlier GM trucks/vehicles the sensors were exposed to the elements . this would be true with the 1994 S10 pick up. this was big trouble for GM in those vehicles ..

most cases when the ABS acts up on this 2000 silverado and the many similiar vehicles now out there , its the front wheel hubs rusted out. this is easy to determine . since the sensor IS a magnet when the rust forms the sensor is quickly blinded to the encoder wheel in the hub.

with a constant sensor error the ABS LT will come on..