2000 Silverado ABS Module

Southern Ray

Well-known Member
I guess my ABS module is failing. The ABS light comes on intermittently, mostly when the temperature rises above 90 degrees.
It rarely comes on between late October through late March, though again intermittently, only in hot afternoons.
In reading up on it and viewing the videos on u-tube I've come to the conclusion that is where the problem lies.
I have a Chilton's manual but it just says to take it to the dealer or a qualified technician.
In viewing the videos it appears my most difficult challenge will be loosening and removing the four screws holding the module in place.
In one video the tech had to disconnect all the brake lines and drop the entire unit and place it in a vise to remove two screws.
The many videos gives three TORX size, 8,9, and 10mm.
Has anyone replaced these units? I don't plan to open it up and re-solder the joints, just replace the entire module.
 
I've replaced a couple of them.

Went back with remanufactured units bought online.

I didn't have any trouble with the bolts, but then I don't live in the rust belt.
 
2001, in frame "C" , under cab. All the lines were my major problem. Stiff, no length for flexing, and you just can't cross thread, because the unit is aluminum! I did take mine apart (difficult due to sealant used), could see no cracks under great light/magnification, but re-soldered anyway and after more than a full days work for this old guy, no joy! Still intermittent. :(
 
Have you scanned it to see what codes it's setting?

While it's possible the module could be failing, the ABS lite also comes on if wheel sensors get "flaky" and for other reasons, as well.
 
I have replaced a few of them and never touched the hydraulic unit or lines. 4-t20 torx screws to remove module piece. if you want to split it apart and reflow the solder joints then you will need to remove the little t8 torx screws.

Also check the two connectors at the module for good connection, and the ground circuits located on body mount on frame right under drivers floor board. This ground point can be loose and you can remove and clean it and add a nut to the bolt to keep it tight.
 
Do you want/need the ABS to work???? My 1999 GMC 1500 pickup got to acting funny and some times throwing a ABC light and code. I just removed the fuse and disabled it. Yes I no longer have ABS but I prefer it that way. Now I good firm brakes. Always before the ABS system seemed to make the pedal soft to me. Even with zero codes.

Even when it was working correctly the early versions of GMs ABS did not work the best in my view. My pickup was just plain dangerous to drive on snow covered roads as the ABS would make the brakes just about not stop you. I have coasted/slide through the stop light here in town several times when there as snow and not been going 20 MPH. The end of the ABS for me is now either a wheel sensor or the module will fail at slow speeds. Like pulling into a parking spot and you have no brakes to stop an it throws a code. Pulled the fuse and love how it stops. LOL

I do not have to pass any state inspections so I am not going to fix the ABS. In my view the truck is safer now than with the ABS.
 
On a couple of different ones I unplugged the module and plugged it back in and it worked. Or at least the light went out.

RT
 
Forget about the ABS. I drove about 40 years before ABS was invented. I had to deal with a failed ABS on a Tahoe. I just removed the fuse and now I have very good brakes. When we have snow/ice on the roads just pump the brakes like we used to do. Works perfectly well.

Also found a way to disconnect that infernal bell that keeps ringing when you get in or out with the key in the ignition. Peace and quiet at last!

When a friend rides with me (he likes country so-called music) he always turns on the radio to listen to that stuff. I just removed the fuse and he thinks the radio just went bad!!
More peace and quiet.
LA in WI
 
Thanks guys for the replies, lots of good information and advise. Long story short I have been chasing this issue for almost five years.
Yes I had scanned it and found ABS. But just the peculiarity in when the lights come on and then stay off for the entire fall and winter months make me think something else is involved. I have replaced front brake pads, a locked up rear caliper, bleed the lines, and a front wheel bearing during this time.
I don't drive it very much, less than fifty miles a week and all on paved roads. Our terrain is flat, rarely do we get ice or snow. When it did I stayed home. When it rains I stay home. It could be something as simple as the corroded fuse holder. I'll check into that.
Pulling the fuse and going without it sounds very tempting given the price of these things.
Again, thanks for the replies.

Ray
 
"Yes I had scanned it and found ABS."

Are you saying you scanned it with a scanner that indicated an ABS problem, but didn't show a specific ABS codes??????

If that's the case, you need to scan it again with a scanner capable of displaying ABS codes.

That will narrow it down to a specific component(s).
 
(quoted from post at 17:27:10 06/13/18) Thanks guys for the replies, lots of good information and advise. Long story short I have been chasing this issue for almost five years.
Yes I had scanned it and found ABS. But just the peculiarity in when the lights come on and then stay off for the entire fall and winter months make me think something else is involved. I have replaced front brake pads, a locked up rear caliper, bleed the lines, and a front wheel bearing during this time.
I don't drive it very much, less than fifty miles a week and all on paved roads. Our terrain is flat, rarely do we get ice or snow. When it did I stayed home. When it rains I stay home. It could be something as simple as the corroded fuse holder. I'll check into that.
Pulling the fuse and going without it sounds very tempting given the price of these things.
Again, thanks for the replies.

Ray

There was an issue with the front disc brakes on several GM vehicles of that time frame. Seems that corrosion would cause the ABS sensors to move away from the rotors which in turn sent a false reading to the computer. This mal-function caused the brake pedal to go to the floor at speeds below 5 mph. My 2001 Silverado suffered from this issue. GM did issue a re-call, but they would not include the trucks. For this reason, I pulled the fuse for the ABS, put black tape over the warning lights on the dash, and never looked back. I LIKE how the truck stops now that the ABS is non-functioning.
 
(quoted from post at 09:04:24 06/14/18)
(quoted from post at 17:27:10 06/13/18) Thanks guys for the replies, lots of good information and advise. Long story short I have been chasing this issue for almost five years.
Yes I had scanned it and found ABS. But just the peculiarity in when the lights come on and then stay off for the entire fall and winter months make me think something else is involved. I have replaced front brake pads, a locked up rear caliper, bleed the lines, and a front wheel bearing during this time.
I don't drive it very much, less than fifty miles a week and all on paved roads. Our terrain is flat, rarely do we get ice or snow. When it did I stayed home. When it rains I stay home. It could be something as simple as the corroded fuse holder. I'll check into that.
Pulling the fuse and going without it sounds very tempting given the price of these things.
Again, thanks for the replies.

Ray

There was an issue with the front disc brakes on several GM vehicles of that time frame. Seems that corrosion would cause the ABS sensors to move away from the rotors which in turn sent a false reading to the computer. This mal-function caused the brake pedal to go to the floor at speeds below 5 mph. My 2001 Silverado suffered from this issue. GM did issue a re-call, but they would not include the trucks. For this reason, I pulled the fuse for the ABS, put black tape over the warning lights on the dash, and never looked back. I LIKE how the truck stops now that the ABS is non-functioning.
"but they would not include the trucks." I believe there was a reason for that.
 

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