Removing the EBCM from a Sierra 1500????

[Big5]

I have a 2000 Z71 sierra with all of the symptoms of the EBCM module gone bad. My ABS light comes on Intermitently, when the light is off the ABS will engage at different speeds when braking. I've checked all of the grounds, changed my brake fluid, replaced the front wheel sensors and checked my wheel bearings.

 

I spent two hours trying lying on my back with rust remover dripping on my face trying to remove just the EBCM module - 4, Torx 20 screws and couldn't get one of them out. Is this a lost cause? Has anyone been able to remove just the EBCM without removing the entire pump? I've removed the bolts attaching the unit to the frame and tried twisting it, but I'm afraid I will break the brake lines if I twist it to where I can see the torx screws. The EBCM module couldn't be in a worse spot.

 

Seems like my only other option is to remove the whole unit. From what I've read on this forum, after removing the whole unit, I won't be able to bleed the air out of the lines and module without taking the truck to the shop and having them use a tech 2 scanner. If I have to do this, will I abe able to drive the vehicle after reinstalling the unit?

[txab]

First have you checked for any codes that are being set? you could drill the head off the remaining screw and then replace it during reinstallation

[ujtruck]

First have you checked for any codes that are being set? you could drill the head off the remaining screw and then replace it during reinstallation

 

 

+1 or grind it, just like I do

[Big5]

Please forgive me for being stupid but if the heads of the screws are facing the floor of the truck, which means you can't see them, you can only feel them, and there is only maybe 2" between the heads of the screws and the underside of the truck, how can you get a dremel or something in there to grind off the heads?

[Big5]

The codes that are being set are:

 

C0265

C0227

C0226

C0269

[Big5]

Ok....now that I have the codes, two of them point to the left front wheel. So I checked out the left front wheel bearing again and I think it may be going bad. It's not terrible but ther is some play. I'm having a buddy come over and give me his opinion. I figure I better rule out the wheel bearing issue before moving on the EBCM module.

[00Silverado4x4]

It's not terrible but ther is some play.

 

I'll tell you from my personal experience...if there is "some" play...there is too much play. Please replace it, I didn't catch mine right away and it caused premature wear of my tires.

[Big5]

I will be replacing the bearing tomorrow. Will let everyone know if this fixes the ABS light problem.

[Big5]

I replaced the wheel bearing and all of the lights and codes are gone, but...............the ABS is still activating when braking under 10 mph. Any ideas as to what the culprit is?

[00Silverado4x4]

Not real sure as I don't have personal experience, but you may still have a problem with the abs sensor from the other hub. From what I've read here rust and crud builds up under the sensor and needs to be cleaned off, rust removed. Glad you've gotten most of the problems fixed. Hopefully this last thing is an easy fix for you.

[Big5]

Update - I ended up replacing both hub bearings, which resolved the issues with the ABS light. I'm glad this frustrating problem is over with. One thing I did learn is that it's not a good idea to remove the wheel sensor from the hub. They break too easily. Also, none of the codes pointed to the passenger side wheel sensor. I went to my local dealer and they charged me $59 to road test my truck with a tech II scanner. They suggested that both wheel bearings be replaced before doing anything else. I took it home and replaced the other side and that resolved the problem. The part cost me $119 and an hour of my labor. Dealer wanted $619 parts/labor. Aftermarket shop down the road wanted $319 parts/labor. Thanks for the advice guys

[00Silverado4x4]

Glad to hear it and your quite welcome. Glad we could help out.

[Jsdirt]

Old thread - I know ... but I just want to add something for those finding this on Google:

 

ANY bi-directional scan tool can do what was done here - it does NOT have to be a Tech 2, and you absolutely do NOT HAVE to go to a dealer! Any small garage can handle this.