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Retired Bob

Recall - Vacuum Pump May Decrease Power Brake Assist

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Anyone had any luck getting reimbursed?

 

I had this exact issue with my '17 back in July.  GM agreed that there was an issue (they had a special coverage at the time) and that the fix was to replace the vacuum pump.  I had to pay for it ($100 on my extended warranty) as I was outside the special coverage.

 

GM now hiding behind an "it's not the same thing" excuse...I've escalated my case but may have no choice but to file a complaint with NHTSA.

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Let’s hope that GM keeps their experiments to the half tons. The 3/4-1 tons seem to be bulletproof, gas anyway. I know back in the day my trucks were support for my equipment. A failure meant next day air a part. Fixing the problem yourself on the job site. Time is money.


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I got mine done yesterday. Key fob didn't lock or unlock the truck for about 2 hours after, but that came back too. We have never had any trouble with braking so I didn't expect to feel a difference and there was none.

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This answers the question about custom ECM/TCM tunes and getting the recall done on the EBCM.... Definitely would flash back to stock before taking it in but recall will not affect ability to reload custom tune since the ECM and TCM tunes are untouched during the recall. 

 

06MonteSS is Lew 

 

https://forum.diablosport.com//viewtopic.php?f=62&t=79342&sid=8580a7cb1d9394c043e83b35d83e12f0

Edited by RE1

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My vacuum pump ticks like an old model "A" running. My breaks work fine but hate how it sounds. My friends 2018 is super quiet. You cant even hear his running next to mine. Any chance they would replace pump?

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Mine does the same thing. Interested in the replies. Brakes work fine so far. Interested in what people have to say before I bring it in for the update. 

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App says I need the recall, website says my VIN not affected.  Duh

 

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On 9/16/2019 at 3:45 PM, aaronarf said:

I just got my 2017 Silverado reflashed today, knowing that my low speed braking was already severely degraded due to vacuum pump not outputting as it should.  The low speed repeated braking isn't worse but you can definitely feel/hear the ABS firing off after the vac pressure gets out of tolerance and the pedal gets hard.  Almost feels like a icy road with ABS hitting intermittently as you hit areas of traction.  I am sure if you prolong the fix and rely on this bandaid it could cause early ABS pump failure.    

 

Bottom Line:  The reflash makes low speed braking BETTER (as in less likely to hit something / no brakes at all) with a failing pump/hard pedal scenario.  It's probably why they decided to do this fix on all - in the event of a failure you will be left with "a little" better brakes which means they save face and money.  Hopefully buying you enough time to stop before having a low speed collision.   TBD how it feels after I replace my pump tomorrow.

 

 

I cannot tell any difference.

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2 hours ago, Sean3565 said:

I cannot tell any difference.

Assuming your pump isn't failing? I installed the revised pump today and the ABS no longer is noticable at low speed when repeatedly braking.

 

Install was relatively easy even doing it on the ground in my driveway.  The most difficult thing for me was unplugging the crank position sensor.  Fought with it for longer than I'd care to admit.  4wd does make it a little more cramped but easily. DIY doable.

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Dealer did the recall update, tire rotation done to torque spec (I checked), wash, coffee and water. $0 and an hour of my time, I have no complaints.  Didn't have an issue before, but free is for me!

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I had my 2014 done yesterday. In and out of the shop in 40 minutes. No issues.

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Had my 2016 done yesterday. Drives the same after can not tell a difference. My dealer said that my truck had the old style pump and they are going to schedule me to replace it under special warranty just to be on the safe side.


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21 hours ago, 15 Z71 said:

My vacuum pump ticks like an old model "A" running. My breaks work fine but hate how it sounds. My friends 2018 is super quiet. You cant even hear his running next to mine. Any chance they would replace pump?

If you are within mileage and you have a good relationship with your dealer, they should.

 

Take your truck in complaining of the symptoms others have, and see what happens.

 

We did this with our 16 Tahoe, and they replaced it without any questions asked.

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35 minutes ago, JimCost2014 said:

If you are within mileage and you have a good relationship with your dealer, they should.

 

Take your truck in complaining of the symptoms others have, and see what happens.

 

We did this with our 16 Tahoe, and they replaced it without any questions asked.

I will try but I do have 51,000 on it now. Probably only going to do recall and say that's normal how it sounds.

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47 minutes ago, 15 Z71 said:

I will try but I do have 51,000 on it now. Probably only going to do recall and say that's normal how it sounds.

You should be good on the miles, just be persistent, they extended the mileage on the extended warranty to 60000 miles I believe.

 

Make sure you tell them the brake pedal is "very hard" to depress at times, and how loud the pump has become.

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