Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Ozer

GM under investigation for faulty brake vacuum pumps

Recommended Posts

13 hours ago, Baytrucker said:

Heh. I stand corrected. Talk about solving a problem no one needed solved. :rolleyes:

 

They have been putting a defective vacuum pump in their trucks for the past 10 years, putting everyone lives at risk, and now that it has come to light they still won't issue a recall unless they are forced to. They are still putting the pump in their new trucks.

 

But their tailgate can do yoga now, so all is good. :D

So true!

Share this post


Link to post
Share on other sites

So, the recall for this issue in Canada has been updated with a resolution.

 

GM is wants to do a programming change?

 

Does anyone know how reprogramming the EBCM is supposed to resolve the issue with a defective part? Does anyone have any information on this?

  • Like 1

Share this post


Link to post
Share on other sites

I am not really up on the newest technology but I am still wondering why they can’t use manifold vacuum on these trucks as
They have done in the past. ?


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites
On ‎8‎/‎7‎/‎2019 at 1:32 PM, Baytrucker said:

So, the recall for this issue in Canada has been updated with a resolution.

 

GM is wants to do a programming change?

 

Does anyone know how reprogramming the EBCM is supposed to resolve the issue with a defective part? Does anyone have any information on this?

I just had this re programming done.  Did absolutely nothing to fix the problem.

Interesting how everyone knows it's a faulty vacuum booster but to avoid a costly recall they do a simple re programming.

I called the Transport Safety Recall line to report that the recall doesn't fix the issue, they informed me that the "programming" is a change in the parameters for the brake system warning message to appear.  So all this means is that for the warning to be triggered it requires less of a vacuum loss.  This is meant to mitigate the risk enough for GM to just make the minimum legal requirements.

The staff at the Transport Safety Recall line are great and the more people who call the better.  Anyone with this issue give them a shout, maybe GM will actually fix the issue. 1-800-333-0510

  • Like 1

Share this post


Link to post
Share on other sites
On 8/29/2019 at 6:19 AM, Heavy Chevy! said:

I just had this re programming done.  Did absolutely nothing to fix the problem.

Interesting how everyone knows it's a faulty vacuum booster but to avoid a costly recall they do a simple re programming.

I called the Transport Safety Recall line to report that the recall doesn't fix the issue, they informed me that the "programming" is a change in the parameters for the brake system warning message to appear.  So all this means is that for the warning to be triggered it requires less of a vacuum loss.  This is meant to mitigate the risk enough for GM to just make the minimum legal requirements.

The staff at the Transport Safety Recall line are great and the more people who call the better.  Anyone with this issue give them a shout, maybe GM will actually fix the issue. 1-800-333-0510

Got my recall letter in the mail. Re-programming sounds like a band-aid. Anyone know whats involved in replacing the faulty part and how much it would cost?

Share this post


Link to post
Share on other sites
28 minutes ago, roadblock said:

Got my recall letter in the mail. Re-programming sounds like a band-aid. Anyone know whats involved in replacing the faulty part and how much it would cost?

The vacuum pump and belt need to be changed out.  I'm not doing mine until I've fought this to the end.  I would get the recall work done, then call the Transport Recall line.  The more of us that call the better.  They can force GM to make a new recall.

 

Share this post


Link to post
Share on other sites

Ya I'm not getting it done until minimum my next oil change either, I agree they should be replacing the whole thing.

Share this post


Link to post
Share on other sites

Mine to is gone. 2015 Sierra. GM says they won’t cover it as it has over 116,000 on the dial. BS I say. They knew this was an issue a year ago. I noticed my brakes not working right but I thought I had dust/grit in them as I work on a gravel road. When I had it in for an unrelated issue ( park assist module gone) they said there was a recall on the vacuum assist pump so they did the update. Made it worse. Now they say it’s toast to the tune of 700 and change. Fixing it in the morning as it’s dangerous now but I’m in talks with GM about responsibilities 

Share this post


Link to post
Share on other sites

 I have a 2014 GMC Sierra.  I’m having the stiff  brake issue while backing up. Brought the truck in for reprogramming. Dealership said that there is a new part number pump GM#12696313 that is replacing #12669488. I ordered the part from an online GM parts shop to fix it myself. I noticed only the GM dealerships have this part number pump. If this is true, then many people who had replaced there pump may still have issues in the future. Also, the dealership did not want to let us take the truck home without it getting fixed and they printed on the invoice of work done that truck is dangerous and shouldn’t be driven till brakes fixed. 

Share this post


Link to post
Share on other sites

My 2018 came with the new style mechanical pump. If your pump is a 2 piece design with a black plate on the back of the pump, you have the latest design. 

 

The old design is a one piece unit. There is a few posts on this forum comparing the old design to the new. The new pump has very different internal design vs the old pump. 

 

My VIN does NOT come back with needing the recall. 

 

 

Share this post


Link to post
Share on other sites
16 hours ago, Darkwolf7 said:

 I have a 2014 GMC Sierra.  I’m having the stiff  brake issue while backing up. Brought the truck in for reprogramming. Dealership said that there is a new part number pump GM#12696313 that is replacing #12669488. I ordered the part from an online GM parts shop to fix it myself. I noticed only the GM dealerships have this part number pump. If this is true, then many people who had replaced there pump may still have issues in the future. Also, the dealership did not want to let us take the truck home without it getting fixed and they printed on the invoice of work done that truck is dangerous and shouldn’t be driven till brakes fixed. 

Damn.  I just put a  GM PN12669488 in my truck yesterday.  Could you take a few pictures of the pump and the packaging before installing so we can compare?  

 

 

Share this post


Link to post
Share on other sites
3 hours ago, aaronarf said:

Damn.  I just put a  GM PN12669488 in my truck yesterday.  Could you take a few pictures of the pump and the packaging before installing so we can compare?  

 

 

Page 4 of this thread there is a link for a video with a side by side comparison of both.

 

Share this post


Link to post
Share on other sites

Ok my 2016 Chevy Silverado is now back in the dealer after they re diagnosed the recall notice sent out Sep 3,2019.  Actually they said that they closed out the recall notice!  I had to stand on my brake at low speed 1mph <.  I finally stopped just in time of hitting a tree.  This second trip to the dealership had found that a vacuum hose has a leak (no cost) to me for the replacement.  I’ll let those know if I have any continued issues.

Share this post


Link to post
Share on other sites

My 2014 GMC Sierra with 105,000km (65,000 miles) was having odd brake pedal vibrations sometimes at starting.  It has had the ECM programming recall performed and the problem worsened.  I took it in this morning and immediately the Service Advisor said its likely the vacuum assist pump and it would be replaced at no charge even though I am well past warranty.  Will see when I get it back at the end of the day.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By midwestdenaliguy
      Got an interesting one for the forum. After the truck (2016 GMC Sierra) has been sitting a while (usually over night or for a few hours) the pedal let's out a nice squeak. On rare occasions I can get it to do it twice in a row, but most of the time the squeak is only for the first press then is gone for all the other presses. Normal daily driving I don't hear it, it's only the first press or when I have to hit my brakes hard (ex, cut off by someone). My local dealer service department (who's treated me well and has good mechanics) looked at it and said they can't repeat it enough to truly diagnose it. Some squeaks are real quick and others last about 2 seconds. The only way I can describe it is like a relief valve letting some air out, but with a squeak. Sometimes I can hold the pedal in place after depressing and the squeak continues to let out. It's not like a metal plunger rubbing on a rubber boot as I depress the pedal, plus I would be able to make the sound every time if that were the case.
       
      Below is a video I took on two different occasions, they are looped a couple times. You'll hear what I'm talking about and see that it's gone on the second press. I did have the vacuum pump replaced due to the recall about a year ago, I noticed it after that but the dealership said the pump and vacuum is holding well the entire time, even when it squeaks. They only guess they had was to replace the brake pedal assembly or the brake booster, but admittedly said that would just be throwing parts at it. Just got the truck back today, didn't get charged for the diagnosis since they couldn't figure it out. Now I'm turning to the forum. Any idea what's going on?!?
       
       
    • By Whiz
      My 2019 SIlverado 4x4 has 3,100 miles.
      It was parked in the driveway last week and when I attempted to enter it into the garage, and in Drive, it sat there for a second or two, and then lurched into the garage.  I instanteously hit the brakes and got it stopped.  When I pressed the gas, the truck just stood still, then took off into the garage.
       
      Now, today, as I backed out of the driveway for a quick errand, the emergency brake would not release, then it released, but as I selected Drive, it refused to move.  I played around with it several times, pressing the brake pedal as instructed, and finally got it to go.  However, I had now brake assist.  It required a ton of pressure to get it to stop.
       
      The dash light up like the 4th of July.  BRAKE showed up in red, engine in yellow, Traction Control in yellow, Tire Pressure (quickly vanished), ABS, and Service ESC.
       
      Am heading to the dealer (48 miles) in the morning.  I was going to connect my DTC and see what was showing, but will refrain, so dealer can see for themselves.
       
      I've noticed a couple of intermittent quirks since I've owned it (July 2019), but things seemed to resolve themselves.  I did receive  December recall and they will get that looked at in the morning.
       
      Am attaching a photo of the dash as i sits now.  The -14.6V DC light is from a piece of equipment I have installed.
       
      Anyone else out there having issues?
       
      Also, photo shows less the 30psi oil pressure at idle, a bit low I am thinking

    • By Brad Davies
      Hey guys,
      I got a 2015 Silverado 5.3l. 138,250km. started ticking sometime last winter. Would happen instantly at start up and last about 5 minutes then would fade away. Sounded like a lifter. Took it to the dealer they said they couldn't hear it. Sound went away so left it.
      Fast forward to this winter and as Soon as the weather started to cool down I noticed the ticking again.
      Took it back to the dealer said they couldn't hear it again. I went and picked up my truck right at closing, soon as I fired her up the sound was there but everyone was gone so no one to hear it. I took a video. Next day I called the dealer, sent the video. Took like a week to get back to me. In the meantime I had taken videos pretty much every time I started it.
      Long story short after a brief fight with them about them trying to say it's normal etc they agreed that it sounded like a noise coming from the valve train. Left my truck with them, they called me said they had to change all lifters. Went to pick up my truck and on start up the sound is still there.
      This was a month ago. Sent more videos and a previous video from before they did the work and they are saying they can't hear it again.
      Took it in in person they agreed that there's an issue again and they will look at it. Now they are saying it's possible bad injector noise but they can't figure out which one 🙄.
      In the meantime I took it to another dealership they changed the vacuum pump. After that the sound changed. Now it's no longer at start up but once the truck has reached operating temperature and is more of a dull sound. Took it back to that same dealer who did the vacuum pump and they said valve train noise and deffo not injectors. But they won't work on it because the other dealer already did. 
      They didn't change the VLOM or the cam. I had/have no check engine lights. Truck runs awesome. Sometimes rough idle.
      Any ideas what it could be?
       
    • By 2002 Chevy Avalanche
      My 2002 chevy Avalanche 1500 Z71 5.3l has 37s mud tires on it, 20 inch rim's, and the abs light turns on and turns right back off on the high way, and then stays off, i heard it not very good for off roading either, which is something i enjoy doing, i read, and some people really hate ABS as it turns out. And they said to just pull the fuse, after i pulled the fuse, i expected the abs light to turn on, but when i looked both the ABS and Brake light were on, any ideas how i can turn that brake light off? The truck still stops good, and there are no problems, just a stupid brake light.
    • By truck_newbie
      I'm finding the brake pedal very noisy. I don't have any braking issues. Every time i press the pedal especially with the radio off, i can hear a loud whoosh and the switch clicking. If this is normal, then it's definitely the loudest brake pedal I have ever experienced. I'm trying to get a consensus if it's normal so i don't waste my time taking it to the dealer. I tried to capture the sound but it doesn't record very well. Full disclaimer that i'm a little more sensitive to noises than most. 
       
      Any one else experience this or is it normal?
      brake_pedal.mp3
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Forum Statistics

    222,388
    Total Topics
    2,381,697
    Total Posts
  • Member Statistics

    211,096
    Total Members
    8,960
    Most Online
    Cvillalobos
    Newest Member
    Cvillalobos
    Joined
  • Who's Online   77 Members, 1 Anonymous, 1,872 Guests (See full list)



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.