Vaccuum Pump Replacement Question

reardiff · March 20, 2023

I know the Vaccuum Pumps on the pre 2019 trucks have extended warranty coverage, but curious if there was any advantage of changing it out proactively before it does become a problem? Or should I just let it go until the extended coverage expires and then decide to either leave it or replace it (assuming it doesn't go by then). Is it just hit or miss on the part? What causes them to go bad, have had mine now for 6 years and 70,000 miles and never had any problems with it but sort of feel like it's only a matter of time.

Yes, I did have the recall done but that was only programming to kick in the ABS if it was to fail so you don't accidently hit something when the pedal goes to the floor is how I understood it, not really fixing anything. Someone correct me if I'm wrong on that. Just curious if there's any reason, I should think about replacing it now (on my own dime), or let it go as long as it's under extended coverage? I also have AFM turned off not sure if that matters which it comes to vacuum produced or needed.

mikeyk101 · March 20, 2023

In my case, they did the reprogramming first too but that was after I experienced the issue a couple times. It was ok then for about a year and then started giving me problems again. This time the vacuum pump was done under the recall.

I don't know if they will just replace the vacuum pump but it looks like coverage on it has been extended to 10 years and 150,000 miles so you should be ok for now.

https://www.carcomplaints.com/news/2022/gm-brake-vacuum-pump-recall-closes-investigation.shtml

This too

https://www.tsbsearch.com/Chevrolet/N182202780

Edited March 20, 2023 by mikeyk101

reardiff · March 21, 2023

Thanks, so I guess the question really is if the pump goes, the TSB shows to just replace the pump and belt. If the pump fails and oil gets in the vacuum line, booster, and master cylinder wouldn't all that need replaced too? Would the extend coverage cover all that as well or would they just replace the faulty pump and the rest all be out of pocket expenses? If that's the case, I'd rather replace it now on my own schedule and save that hassle and expense for what I'm assuming is inevitable.

Spurshot · March 28, 2023

On 3/20/2023 at 1:25 PM, reardiff said:

I know the Vaccuum Pumps on the pre 2019 trucks have extended warranty coverage, but curious if there was any advantage of changing it out proactively before it does become a problem? Or should I just let it go until the extended coverage expires and then decide to either leave it or replace it (assuming it doesn't go by then). Is it just hit or miss on the part? What causes them to go bad, have had mine now for 6 years and 70,000 miles and never had any problems with it but sort of feel like it's only a matter of time.

Yes, I did have the recall done but that was only programming to kick in the ABS if it was to fail so you don't accidently hit something when the pedal goes to the floor is how I understood it, not really fixing anything. Someone correct me if I'm wrong on that. Just curious if there's any reason, I should think about replacing it now (on my own dime), or let it go as long as it's under extended coverage? I also have AFM turned off not sure if that matters which it comes to vacuum produced or needed.

In my 2014, the symptom was lack of power assist in the brakes. It seemed to be rare and intermittent. But it happened several times at very inopportune times. The last one scared me pretty bad. I was sure I was going to hit the car stopped in front of me. I had 2 feet on the brake pedal. It felt like less than zero power assist if there is such a thing.

I took it in for the recall and they flashed the software. No pump replacement. That was 3 years ago. It's been good since. But I also have thought about pre-emptively replacing the pump with the new design.

I also thought about going to a hydra-boost like the 2500-3500. The issue is the accessory bracketry for adding the hydraulic pump. I just don't know where to start. I'm guessing there are LS engine OE brackets that would work, but ???