Jump to content

Letter from GM on 2014 and up Sierra Vacuum pump failures

Ed S

By Ed S
in Engines & Drivetrain

 Share

Recommended Posts

pewterliftedz Enthusiast

pewterliftedz

Posted
Posted

There are already 4 or 5 threads about this topic, I just got mine changed out this week. I just went in and told them the brake pedal feels hard sometimes, and they changed the pump no questions asked.  I am still under factory warranty on my 17'

sierra4102 Enthusiast

sierra4102

Posted
Posted
2 hours ago, pewterliftedz said:

There are already 4 or 5 threads about this topic, I just got mine changed out this week. I just went in and told them the brake pedal feels hard sometimes, and they changed the pump no questions asked.  I am still under factory warranty on my 17'

?, how does ur pedal actually feel, i have a 14 sierra 5.3, my pedal is some what hard but it also aplies the brakes better than any vehicle ive ever had

pewterliftedz Enthusiast

pewterliftedz

Posted
Posted (edited)
15 hours ago, sierra4102 said:

?, how does ur pedal actually feel, i have a 14 sierra 5.3, my pedal is some what hard but it also aplies the brakes better than any vehicle ive ever had

I would get a stiff pedal when I would first start up the truck, and a audible high pitched sound at the same time.  I think it was my truck warning me about low vacuum.  It was rare though, but I did have a constant tick coming from the engine bay.  The tick is gone now that the pump has been changed. 

Edited by pewterliftedz
mookdoc6 Senior Enthusiast

mookdoc6

Posted
Posted

Got my letter....thanks!  But no thanks...84K miles!  I change my oil every 10K...Vacuum pump should have failed years ago?  Wait maybe it's failing right now?  What do I care?  Not like I will have any Dealer install it charge me 1K and probably F' something else up....Or I will just drive it like I do with every other vehicle for another 30K before I actually do something about it?

Doublebase Enthusiast

Doublebase

Posted
Posted

I'm not surprised they're not providing a recall, even with a safety function like the brakes. Extended warranties seems to be the way manufacturers go if they can get away with it. I owned a Lexus LS460, their brake actuators would fail. Lexus would not recall them despite it bei a common and dangerous issue. Instead they extended the warranties on them for a few years and a certain mileage threshold. Once you were out of that you were on the hook for the repair yourself. It was a $3,500 dollar repair. Mine was starting to go - out of extended warranty of course - I traded it in and got rid of the headache. Spending $3,500 for a part that isn't a major component like a transmission or engine is too rich for my blood.

  • 5 years later...
LEM New Member

LEM

Posted
Posted

  I bought my 2015 sierra denali in november of 2015 and have never received a letter about the vacuum pump being recalled and have been having problems for sometime now but have 220 thousand on it now can it still get fixed or is it my expense now

  • 2 weeks later...
Ned Necessity New Member

Ned Necessity

Posted
Posted

My vacuum pump still works on my 2015 Silverado 5.3, but everyone else's experiences spooked me into action; I abandoned it in place.

My suggestion (and it works perfectly) is: Locate your PCV vacuum line on driver side of engine. Remove it (for safekeeping), and replace it with 3/8" rubber vacuum hose. Clamp new hose back on to PCV valve at front of engine and onto the intake manifold vacuum port. Cut that hose in half about midway back. Insert a 3/8" brass T to rejoin the halves. Remove original vacuum pump tubing from vacuum detection module at brake booster port. Connect another piece of 3/8" rubber vacuum hose to it and the remaining port on the T. Ensure that all connections are leak tight.

Whether in V8 or V4 mode, it works great. Don't forget to cut your vacuum pump drive belt.

  • 1 month later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • pyoung62
      2026 DENALI 6.2L

      By pyoung62 · Posted

      I agree with Tim.  As tech heavy as engines are these days, no way I’d be an early buyer of the new 6.6.  Of course, I bought my ‘26 Denali w/the 6.2 after dumping my Tundra with it’s defective 3.5 liter imploding engine disaster, so I’m a little gun-shy.  That said, my 6.2 has been rock solid.  I don’t drive it like I do my BMW Z4 M40i, but I don’t baby it either.  I got a V8 for a reason.  But I’m averaging 18 around town and 22 highway.  I have seen 24 highway as well when I wasn’t loaded up heavy.  Considering my Tundra with the twin turbo V6 only got 14.5 in town and 17 on the road, I’ll take the 6.2 all day, every day.  If I were you, I’d grab a ‘26 while you can.  Inventories are probably gonna start dropping and I’ll bet the deals will start looking sweeter as well.
    • ShowMeShooter1332
      Can you add a 360° Cameras hard button to a 2021 Sierra?

      By ShowMeShooter1332 · Posted

      I am curious if anyone has figured out a way to add an hard button AUX or 360 Camera switch to the center row of switches. I have a 2021 AT4, and want to split the hill decent button and add a 360 camera button so that you don't have to go into the center display and locate the camera functionality, etc...   My father's 2024 Yukon XL AT4 and it has a hard button, see below. I found this thread on the Yukons, but it seems like there may not be a part number for the 2021 sierras. https://www.gm-trucks.com/forums/topic/255339-adding-hard-button-for-camera-on-2021/ Anyone else figured this out. Seems like it would need to be a custom switch!   I am getting ready to install the auto stop/start eliminator, so would be nice to knock them out at once.     Upvote1Downvote0Go to comments
    • Grumpy Bear
      Winter Returned

      By Grumpy Bear · Posted

      Looks like the entire state is burning. 😬
    • Chuck FB
      Oil Consumption

      By Chuck FB · Posted

      Through the years it hasn't been my typical method as I tried to drop oil on an engine that was hot from having been worked, however that was not always practical and had to fire up a unit and let it warm up reasonably well and drop the oil when I had the time to do it but am referring to not only vehicles but a variety of farm equipment and highway tractors etc. However on a vehicle where one is crawling under it and the exhaust is nearby to ones body and if wanting to pull the plug without danger of being hit with boiling hot oil or attempting to remove a HOT oil filter, its sure safer and easier to not have everything smoking hot and can remove the filter right away when under the vehicle and let it all drain. Of course its not the end of the world if a bit of oil stays in the engine that might have eventually found its way out, I like to get out as much as possible but any oil changes that take place in shops would rarely be sitting around for very long at all before the plug is thrown back in and filter slapped on and oil poured in and sent out the door quick like. There would be very little time spent ( assuming they even did it ) in starting the engine with oil to fill the filter, then waiting to verify the level on the stick. A good reason to check ones oil level shortly after a shop changed the oil on a vehicle just to make sure its correct and to look under for any oil around the drain plug or filter. 
    • CPhelps
      4 Wheel Drive System

      By CPhelps · Posted

      Cool to see another Vermonter!

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...