Vacuum pump & mechanics

Blue17 · July 13, 2017

EVERY thing on a vehicle is a safety item these days. they are all connected in some way. Fact is mechanical things break. nothing in this world is made so perfect that it cant break. just because something broke doesn't mean issue a recall on it right away. If the OEM's were to be held by that standard no one could ever afford to buy a vehicle and all the companies would go out of business. Yes these truck are expensive no doubt. and yes the OEM's need to constantly thrive to build a better product. but a recall doesn't need to be issued every time a part built by humans fail. Okay let the flaming begin

FU Motorsports · July 13, 2017

I couldnt have said it better, Blue17. Amen to that.

bgmartin · July 13, 2017

I'm new to the forum, not sure if my post sparked the comment about safety and recall. I was just sharing so that others may know if they get the same issue. Chev dealership was great, fixed it in a couple of hours under warranty.

Spurshot · July 13, 2017

I think the point is that reporting the issue contributes to a national database of issues. NHTSA will determine whether it is a safety issue, based on the consequences of the failure and the frequency of failure. It's kinda like your doctor reporting flu in his patients to CDC.

Boardmember · July 13, 2017

I'll tell you the safety issue. Taking it to the dealer four times for this exact issue. Yes I was able to make it stop. Unexpected, sudden occurrence. Significant effort, not nominal. Sometimes in much less than ideal conditions (read: crowded parking lot in rain, positioning to park on an incline...)

I wanted it fixed. Dealer ultimately traded me out - '16 for a '16 - special consideration, but no specific allowance for my concern. As in, the next guy could have gotten the same deal. Yes I lost money even as I realize my vehicle isn't an investment. I couldn't stand the risk - especially as I couldn't get a diagnosis.

Now, it's a recognized issue. I'm glad for y'all.

qwank · July 14, 2017

There's a service bulletin for this issue now, GM wants you to replace the pump, booster, master cylinder and the line from the pump to the booster. The pump is definitely a redesign, but I didn't notice anything different with the rest of the parts.

Consumer Advocates · October 26, 2017

Class action attorneys are currently investigating this issue and would like to hear more about your experience. Did you notice it only at low speeds? Did the brake pedal become hard or difficult to press?

You can contact us via email at: [email protected] or visit: https://www.consumeradlaw.com/gmhardbrakepedal

There is absolutely no cost or obligation on your part. If you would prefer to reach out by phone, we can be reached at (855) 425-2775.

wmgeorge64 · October 26, 2017

I was under mistaken idea that since these trucks have high pressure direct injection fuel systems that engine vacuum was not available?

Edited October 26, 2017 by wmgeorge64

Artie61 · October 27, 2017

I tell the wife to take my truck all the time this may be a concern to think about !

I wonder why this would not throw a code seems like a another sensor is needed here .

Paintor · October 27, 2017

On 11/13/2016 at 9:29 PM, mkward72 said:

I fail to see is why it's a safety issue. The breaking system Never failed. You just have to press the pedal harder. When the power steering pump goes out it's a safety issue to? You don't lose steering just the assistance to turn the wheel easier.

When there is a low voltage issue.....you DO lose steering ......there are stories on here of people having the steering wheel ripped from their hands and loss of ability to steer. So far been bad grounds/dead cells is batteries/too much resistance in battery cables.

Paintor · October 27, 2017

6 hours ago, Artie61 said:

I tell the wife to take my truck all the time this may be a concern to think about !

I wonder why this would not throw a code seems like a another sensor is needed here .

There is a Vacuum sensor on the brake booster. When low vacuum is detected, it disables AFM....it should flash on the dash that you are SCREWED if the computer detects low vacuum.....I dont think it would be hard for someone to design an aftermarket Vacuum gauge and tie into that sensor.

Lots of us would buy them.

2016 Sierra Owner · October 28, 2017

10 hours ago, Paintor said:

When there is a low voltage issue.....you DO lose steering ......there are stories on here of people having the steering wheel ripped from their hands and loss of ability to steer. So far been bad grounds/dead cells is batteries/too much resistance in battery cables.

So your telling me that GM put a vehicle on the road that relies on the steering system to be powered by electricity at all times to maintain steering control of the vehicle? That's BS!

KARNUT · October 28, 2017

So your telling me that GM put a vehicle on the road that relies on the steering system to be powered by electricity at all times to maintain steering control of the vehicle? That's BS!

Not BS, my son got rid of a 15 Tahoe that did just that. Along with blinking dash lights and head lights. She had her daughter record the event and showed the dealer. Funny how they had a two week wait for a fix at the dealership. The problem was never fixed, he took at 15K hit on the POS.

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Chris j · January 11, 2018

This happend to me today first my ac compressor shells now this i reported this i urge everyone to report this it was so sudden if i was pulling a trailer i would have most likely wrecked

gone_fishing · January 11, 2018

12 hours ago, Chris j said:

This happend to me today first my ac compressor shells now this i reported this i urge everyone to report this it was so sudden if i was pulling a trailer i would have most likely wrecked

Did your vacuum pump go out?

Edited January 11, 2018 by gone_fishing