Recall - Vacuum Pump May Decrease Power Brake Assist

Sierra Dan · September 11, 2019

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.

KARNUT · September 11, 2019

Seems all the V-8s I owned didn’t have to this problem prior to the 14 model. Without much research I bought my 14. After joining this forum and learning about cylinder deactivation and all it involves I unloaded it. I was having flashbacks to the 5.7 diesel. External vacuum pump, what the hell. I’m done with new GMs unless they use a normal engine again.

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dsatwork · September 11, 2019

I just got back from towing my 27' Airstream with my heavily loaded 2015 Silverado 5.3 1500 3.73 from San Diego to (Show Low) White Mountains in AZ via the Salt River Canyon and had to brake hard once with the trailer and once without the trailer on this trip and neither one felt right. First I thought it was because of the heavy load, but when it happened empty without the trailer, it made me wonder if there was an issue. The only other factor was that I had the brake lines flushed just before I took off, so at first it felt a little funny because of that as well. Regardless, I'm scheduled to get the system reprogramed next week before I head up to Idllywild for the weekend. Don't use my brakes much when towing and depend on the Tow Haul mode to keep me safe coming down 6% grades.

1SLOW1500 · September 11, 2019

I just got back from towing my 27' Airstream with my heavily loaded 2015 Silverado 5.3 1500 3.73 from San Diego to (Show Low) White Mountains in AZ via the Salt River Canyon and had to brake hard once with the trailer and once without the trailer on this trip and neither one felt right. First I thought it was because of the heavy load, but when it happened empty without the trailer, it made me wonder if there was an issue. The only other factor was that I had the brake lines flushed just before I took off, so at first it felt a little funny because of that as well. Regardless, I'm scheduled to get the system reprogramed next week before I head up to Idllywild for the weekend. Don't use my brakes much when towing and depend on the Tow Haul mode to keep me safe coming down 6% grades.

Sorry have to ask. Did you set up and use a trailer brake?

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dsatwork · September 11, 2019

Yes, and I keep the trailer brake screen on the dash front and center, when I first take off to make sure everything is connected. No offense taken, been on these forums long enough to know that the obvious isn't as obvious as you would think and hope.

dsatwork · September 11, 2019

1 hour ago, 1SLOW1500 said:

Sorry have to ask. Did you set up and use a trailer brake?

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Yes, and I keep the trailer brake screen on the dash front and center, when I first take off to make sure everything is connected. No offense taken, been on these forums long enough to know that the obvious isn't as obvious as you would think and hope.

15 Z71 · September 12, 2019

I had got a letter saying they would extend the warranty for 6 years or 72,000 miles for this issue. My question is if I take it for this re program and have the pump go out down the road will they still repair it if I'm under the special coverage? Or should I just wait until my special coverage is getting closer to running out? Or they going to try and say the re program is the fix the letter means nothing now?

16LT4 · September 12, 2019

7 hours ago, TXGREEK said:

Discount Tire does it for free

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.

TXGREEK · September 12, 2019

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.

I assure you, a college degree is not required to change oil or change a tire lol. Sounds like you’ve got it all figured out

Mikebtte · September 12, 2019

11 minutes ago, TXGREEK said:

I assure you, a college degree is not required to change oil or change a tire lol. Sounds like you’ve got it all figured out

Haha, yup. If not for highschoolers I would never find technicians.

I have gotten a few fresh out of trade school only to find out they wasted some money's.

Had one fresh out of school that was unable to change a belt.

If the shop does have a knowledgeable tech, you can bet he ain't doing tires.

Edited September 12, 2019 by Mikebtte
Words.

16LT4 · September 12, 2019

16 minutes ago, TXGREEK said:

I assure you, a college degree is not required to change oil or change a tire lol. Sounds like you’ve got it all figured out

I never mentioned college?

I seldom let a “trained professional” do any work for me because it’ll always be more work for me to fix their mistakes. Some lackey moron touching my truck is asking for trouble; I know I’ll have to retorque my lugs when I get home, but at least the dealer has more to lose if something goes wrong, and my lift is occupied.

Edited September 12, 2019 by dukedkt442

TXGREEK · September 12, 2019

I never mentioned college?

I seldom let a “trained professional” do any work for me because it’ll always be more work for me to fix their mistakes. Some lackey moron touching my truck is asking for trouble; I know I’ll have to retorque my lugs when I get home, but at least the dealer has more to lose if something goes wrong, and my lift is occupied.

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.

jay webb · September 12, 2019

13 hours ago, 1SLOW1500 said:

I think you will find people will be cleaning and rebuilding the pumps in the future. Also doing line clearing to judge the health of the pump.

I know GM will not switch over, however the electric pumps found on the Corvette seem a better option.

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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.

jay webb · September 12, 2019

1 hour ago, 15 Z71 said:

I had got a letter saying they would extend the warranty for 6 years or 72,000 miles for this issue. My question is if I take it for this re program and have the pump go out down the road will they still repair it if I'm under the special coverage? Or should I just wait until my special coverage is getting closer to running out? Or they going to try and say the re program is the fix the letter means nothing now?

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.

bkesting · September 12, 2019

7 hours ago, 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.

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