Recall - Vacuum Pump May Decrease Power Brake Assist

1SLOW1500 · September 12, 2019

i have replaced two brake module/vacuum pump/booster assemblies on the 2019s already. its an all in one unit. the only part that is separate is the fluid reservoir. they have software issues. its all electronic.

Ok sounds like I need the gm "update" soni can we what it is and add it to my file tunes. Send a email in the morning. Thanks

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Capt Bob · September 12, 2019

Checked my VIN but it doesn't show a recall. Maybe I have the newer version pump or my VIN hasn't been added yet so I'll keep checking/waiting for a letter. Like was stated above, yet another good reason to stay on top of maintenance dealing with a clean oil supply.

KARNUT · September 12, 2019

Most likely, same tech schools, Discount Tire is a fantastic company that I’ve brought my daily driver and exotic toys to throughout many years with zero issues.

There’s 3 in Conroe, probably because of their reputation of tires falling off. You can watch them through the glass. They double check with a torque wrench. I admit I use to check their work. Never found a loose lug.

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camcamaro1991 · September 12, 2019

17 hours ago, dukedkt442 said:

Who the heck is that and why would I trust a high school drop out to touch my truck? Dealer provides 2 free rotations, so if convenient I’ll do them.

I can rotate them for free too and do on my other 4, but the recall is the final impetus to drag myself the 5 miles down there to the dealer.

As a former discount tire employee (days of 5 were hired and only 3 could keep their job, today auditions are gone), started back in the firestone/ford recall days, and later becoming a MB Master tech, dealerships have the worst tire and rotation on the planet period. They use impacts on wheel locks... they don't torque locks either.

At my dealership it was so bad, I was made the 1 and only wheel and tire guy, 1 guy to do them all, even SLR wheels. Our president would have his family vehicles delivered to me from his other dealerships, that how bad dealership techs are at tires, few and I mean few should ever be allowed to touch a wheel and tire, let alone do flat repairs. none of them could calibrate the balancer install low pros without ripping them, I worked on hundreds of celebrities cars, loads of local sports stars from the cowboys, mavs, stars, FC club, musicians, actors, porn starts, local news reporters, and the ridiculously rich where I was paid to go to their house to remove them bring them back install and drive back out there to re install the assy... etc....

Another example my mom took her esky to caddie dealership, for the typical chrome peeling causing a slow leak, yeah the tech took a grinder to the wheel where the tire bead seals it only made it worse.

Working at discount tire was 10x harder than being a MB tech. Dealership techs... LOL and I was one, it was bonkers to watch them F up wheels & tires everyday.

I wont let any of my GM dealers touch my wheels and tires, I bought a coats tire machine and hunter tire balancer to do it myself, saving up for an alignment rack next, bet you wish I was your neighbor.

Edited September 12, 2019 by camcamaro1991

Sierra Dan · September 12, 2019

15 hours ago, bkesting said:

So there is a newer style pump? If so, is it hard to change out?

The pump is around $135 + the new serpentine belt if you so choose to replace.

From what i hear it takes about 1-2 hours or so to change out.

Here is a video:

https://www.youtube.com/watch?v=FRNXYmD30e8

Edited September 12, 2019 by Sierra Dan

jay webb · September 12, 2019

18 hours ago, bkesting said:

So there is a newer style pump? If so, is it hard to change out?

its an updated pump. what internally different im not sure. i dont take them apart.

i dont find them difficult to do but.... im an actual tech , i know what tools i need, what to remove , etc. i typically can do them in about 30 mins , 45ish on 4 wheel drives. a lil less clearance due to front diff/axles.

jay webb · September 12, 2019

2 hours ago, Sierra Dan said:

The pump is around $135 + the new serpentine belt if you so choose to replace.

From what i hear it takes about 1-2 hours or so to change out.

Here is a video:

https://www.youtube.com/watch?v=FRNXYmD30e8

you dont need to replace the serpentine belt, but it does have to be removed and the ac belt and the vacuum pump belt. under the special coverage we replace the vacuum pump belt to.

jay webb · September 12, 2019

On 9/11/2019 at 3:37 PM, Sierra Dan said:

This recall however does not take care of the known faulty Vacuum Pump. Faulty Pump recall came about a few months back where they replace the pump if

a loss of braking power is detected.

This software update is a band aid quicker and cheaper fix than replacing the root problem.

Aside from a possible loss in braking power...……..when the pump goes, it causes metal shavings to enter the oil system thus possibly grenading the engine.

Which is another good reason for replacing the newer upgraded Vacuum Pump.

i have yet to see the pump come apart and sending metal shavings into the oil system. i have replaced about 50 of them.

1SLOW1500 · September 12, 2019

My understanding is the issue is oil gets past the pump.and into the booster. Not metal shavings.

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bkesting · September 13, 2019

8 hours ago, Sierra Dan said:

The pump is around $135 + the new serpentine belt if you so choose to replace.

From what i hear it takes about 1-2 hours or so to change out.

Here is a video:

https://www.youtube.com/watch?v=FRNXYmD30e8

thank you

bkesting · September 13, 2019

5 hours ago, jay webb said:

its an updated pump. what internally different im not sure. i dont take them apart.

i dont find them difficult to do but.... im an actual tech , i know what tools i need, what to remove , etc. i typically can do them in about 30 mins , 45ish on 4 wheel drives. a lil less clearance due to front diff/axles.

Thanks

jay webb · September 13, 2019

5 hours ago, 1SLOW1500 said:

My understanding is the issue is oil gets past the pump.and into the booster. Not metal shavings.

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the vacuum pump is located on the driver side of the engine block just above the oil pan at the front of the block, it is driven by a belt on the pulley system. then a vacuum line runs from the top of the pump to the booster. in all the pumps ive replaced and remove that line from the pump to do so i have never seen any oil escaping from there.

silverado2k18 · September 14, 2019

On 9/12/2019 at 7:29 AM, Capt Bob said:

Checked my VIN but it doesn't show a recall. Maybe I have the newer version pump or my VIN hasn't been added yet so I'll keep checking/waiting for a letter. Like was stated above, yet another good reason to stay on top of maintenance dealing with a clean oil supply.

my vin isnt listed either, and verified with the dealer. keeping up on those oil changes as well!

1SLOW1500 · September 14, 2019

the vacuum pump is located on the driver side of the engine block just above the oil pan at the front of the block, it is driven by a belt on the pulley system. then a vacuum line runs from the top of the pump to the booster. in all the pumps ive replaced and remove that line from the pump to do so i have never seen any oil escaping from there.

I know all that however that is in the service bulletin. And a reason to cheack and replace booster. And why there was lawsuit filed on this. The claim was oil from a failed pump destroyed the booster and it was a safety concern.

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aaronarf · September 14, 2019

On 9/11/2019 at 11:27 PM, jay webb said:

ok the special coverage is for a faulty vacuum pump which is a mechanical pump attached to the engine. this is not a recall. the recall is a reprogram of the EBCM software. two separate things. now i think gm is thinking if they change how the abs/ebcm uses the vacuum will prevent the pumps from wearing out. as a tech who has change 50ish of these pumps under special coverage i believe its a lack of proper oil changes, its attaches the engine and supplied oil from the oil system. people dont change their oil properly. wait til its says change oil soon/ or 0% or going 1000s of miles pass 0% oil life. I KNOW what is the point of the oil life monitor system? well its to inform you to change your oil but its based on software that uses an algorithm based on engine use/conditions. i have a 2018 sierra. i change my oil every 5000 i dont wait for the truck to tell me.

In hind sight, my pump has been showing signs of failure for the last 10-15K miles, unfortunately for me I was outside of the 72K miles when the TSB was released. That being said, I do not agree that all failures are related to dirty oil or lack of maintenance it could accelerate the inevitable though. I change my oil regularly -- 11 times at an average of 7K miles over 78K miles using Mobil 1 EP (Last 6 changes) & Pennzoil Ultra Premium (First 5 changes). The AFM was deactivated within the first 7K miles via Range Device.

I was debating on trading in my truck on something else, or fixing the problem. Today I ordered the new pump, and scheduled an appointment for the ECM re-flash Monday morning. I am going to install the pump Monday myself after my re flash, hopefully the install won't be too difficult!