Jump to content

Noise under acceleration 35-45mph

Chevy NDT Guy

By Chevy NDT Guy
in Troubleshooting & Recalls

 Share

Recommended Posts

Chevy NDT Guy Enthusiast

Chevy NDT Guy

Posted
Posted

New member, thanks for the add. :)

 

I tried searching the forums for noises during acceleration, but the other topic didn't quite match my issue.  

 

(Specs: 5.3L stock. 112k miles. No after market parts that I'm aware of.)

 

I have a 2014 High Country 5.3L. I love this truck, her name is Pearline.  She is leaps and bounds nicer than the 07 LTZ I had.  But, like all relationships, over time, they start to dwindle.  (Heated seats don't work, fuses are fine. I'll search the forum for that next).

 

Issue is though:

 

If I'm cruising on a flat road or a decline, and I punch the accelerator, I don't hear it.  But, if I'm on a slight incline and crusing, if it down shifts without me increasing throttle, I don't hear it....

 

But, while in gear, if I give it more gas, while on incline, I hear a good awful noise. Only doesn't it at about 35-45mph. It only last a few seconds, then goes away, even if still accelerating.  Doesn't do it at higher speeds. Just down shifts and goes. Only when it's around 35-45mph and a get in it aggressively.

 

I'd say it sounds like a vacuum line, but that doesn't quite explain it.  Sounds like sliding a big metal cabinet across a concrete floor. But again, only last a few seconds, doesn't do it every time, but it does happen.  Didn't do it when I bought it. So I'm sure something has worked it's way loose or worn out. 

 

Thanks for any input you guys have.

 

Mike

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted
10 minutes ago, Chevy NDT Guy said:

I have a 2014 High Country 5.3L. I love this truck, her name is Pearline.  She is leaps and bounds nicer than the 07 LTZ I had.  But, like all relationships, over time, they start to dwindle.  (Heated seats don't work, fuses are fine. I'll search the forum for that next).

Your heating elements are shot. '14 and '15 trucks were notorious for this. Mine have been replaced twice under warranty. Second set is still holding up thankfully.

 

As far as your noise....  not much help there.

Can you isolate the general area the noise is emitting from? Such as transmission, rear end or engine area?

 

 

 

Chevy NDT Guy Enthusiast

Chevy NDT Guy

Posted
  • Author
Posted
5 minutes ago, Sierra Dan said:

As far as your noise....  not much help there.

Can you isolate the general area the noise is emitting from? Such as transmission, rear end or engine area?

 

 

 

Sounds like it's coming from under my feet. Or in the engine compartment.  It's not a super loud noise, but it's noticeable. I can try to capture the noise when I get off work.

 

As for heating elements, is that an easy fix? Something a shade tree mechanic could handle?  I'm a decently mechanic savvy guy. Some things I don't attempt, ie anything with engine/tranny due to safety reasons. But I used to have an old SS Monte Carlo and a Cutlass Holiday Coupe, and I was always going stuff to those things. Can't count on one hand how many starters and detent cables is had to put on. Lol

damnthetorpedoes Enthusiast

damnthetorpedoes

Posted
Posted

Heating elements you just need to remove the leather seat skin and replace the element pad. 

 

What tires are you running and how old are they? Under moderate acceleration I get a unique noise but it started when I put new tires on, so I think its due to the aggressive tread pattern. Just a thought. 

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

Welcome to the site Mike, BTW.

Plenty of good people here. Unfortunately a few trolls also :troll:

My elements were replaced under warranty, so I cannot give you any details on how hard or easy it is.

From what I understand, the hardest part of the repair is removing or more-so re-installing the seat cover.

Other than that it is just a wire mat sandwiched between the foam. Both my seat cushion and lumbar back elements had failed.

I am with you on not attempting certain repairs.

Sometimes we can do more harm than good there.

Is your 4wd selector knob in 2wd? When in Auto 4wd or say 4hi you can hear certain growling noises which are normal. Especially when applying throttle.

Maybe a dumb question but check to see that your selector knob is in the 2wd position. Assuming you have a 4x4.

Chevy NDT Guy Enthusiast

Chevy NDT Guy

Posted
  • Author
Posted
44 minutes ago, Sierra Dan said:

Welcome to the site Mike, BTW.

Plenty of good people here. Unfortunately a few trolls also :troll:

My elements were replaced under warranty, so I cannot give you any details on how hard or easy it is.

From what I understand, the hardest part of the repair is removing or more-so re-installing the seat cover.

Other than that it is just a wire mat sandwiched between the foam. Both my seat cushion and lumbar back elements had failed.

I am with you on not attempting certain repairs.

Sometimes we can do more harm than good there.

Is your 4wd selector knob in 2wd? When in Auto 4wd or say 4hi you can hear certain growling noises which are normal. Especially when applying throttle.

Maybe a dumb question but check to see that your selector knob is in the 2wd position. Assuming you have a 4x4.

I enjoy trolls though. It's good entertainment if you can catch em.  (I'm sure the obligatory "heated seats don't work? Must be totalled" response will be posted in due time) lol

 

I do have new tires, but it did it even before that. I keep the selector in 2wd mode. Haven't tried putting it in Auto or 4wd-hi to see if it still does it. 

 

At first I thought bearings somewhere, or even yoke, but there is no loss of power when it happens. 

 

I'm hoping my Samsung's mic is sensitive enough, I'm going to try to replicate it and get a video of the sound.

 

 

  • Haha 1
aseibel Senior Enthusiast

aseibel

Posted
Posted

I think your noise issue is when the truck is in v4 mode and you want to accelerate, but it takes a second for the truck to realize is is not making enough power, so it switches back into v8. I've heard a similar sound in that situation you describe. There is one stretch of road it always happens on when I'm going around 40-45 mph.

 

Try switching your DIC screen to the one that shows the v4 inidcator and see if it only makes the sound when you're in V4. It it really bothers you, there are ways to prevent it from going into v4, but I don't think its really a problem, just learn to ignore it.

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

To test what Andy is describing with V4 mode operation, select M for manual and use the +/- sign on your shifter and stop at M5

This will keep your truck in V8. Drive around for a while and see if the noise you are hearing stops.

  • 2 years later...
premier121212 New Member

premier121212

Posted
Posted
On 2/25/2019 at 4:23 PM, Chevy NDT Guy said:

I enjoy trolls though. It's good entertainment if you can catch em.  (I'm sure the obligatory "heated seats don't work? Must be totalled" response will be posted in due time) lol

 

I do have new tires, but it did it even before that. I keep the selector in 2wd mode. Haven't tried putting it in Auto or 4wd-hi to see if it still does it. 

 

At first I thought bearings somewhere, or even yoke, but there is no loss of power when it happens. 

 

I'm hoping my Samsung's mic is sensitive enough, I'm going to try to replicate it and get a video of the sound.

 

 

Did you ever find the solution?

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

    • kickass audio
      Software Update

      By kickass audio · Posted

      when it's greyed out that is it's way of telling you that it's downloading the patch in the background. Eventually it will be fully downloaded and then it will prompt you at ignition shut down to run the update. I highly recommend doing the update once you get home and can run it a few times. I've had several issues with updates not going the first time around and I had to retry the update multiple times in my driveway before it was successful.   Some updates are huge and take awhile to download. You can help it by connecting to your home WiFi and keep the truck on service mode for the ignition and keep it alive for awhile on a battery charger too. There are specs it needs to be in for updating such as a full enough battery charge, no running ignition, etc.
    • Chuck FB
      Software Update

      By Chuck FB · Posted

      I am not techy at all but wondered if you have the truck running but sitting still in park as some functions gray out as soon as the truck is moving. I believe in the settings for updates you can choose for it NOT to update and I wonder by chance if maybe that was chosen before and now it won't allow you to chose to press update, I think that is back in the settings menu where it has all the items one wants on or off etc. Also I assume you have a wifi connection and checked that it has some signal strength, not that it would have anything to do with the grayed out updates choice in that case. What I am thinking out loud of here may be be of no value but thought I would suggest it, sometimes it can be the simplest thing that resolves an issue.  
    • Chuck FB
      Dave's Auto (custom engine builder) tear down of L8T

      By Chuck FB · Posted

      The so called rare failure that some certainly liked to tout ( die hard Ford fan boys ) as per the lifter failing and wiping out the cam. Back when it started happening the blame was being pointed to the lifters and honestly I never did hear anything myself conclusively one way or the other on that. Ford themselves in I believe 2024 had a technical bulletin I will call it that came out and for some engine platforms they were reprograming the engines idle speed but also they had a software update for the oil pump which then some time later was said what that software update did as to be increasing the oil pressure at idle. It is a good question if that issue was completely solved as one Ford specialist mechanic youtuber said he saw failures after that time period. Like anything there would be the variables, what oil is being used and the OCI and how much idle time gets put on an engine. I've seen some comments to claim that the L8T isn't so happy with high idle time either but I also know that companies that require their vehicle to idle a lot on the job don't tend to get the oil changed often enough for all those hours of idle time and go off of the odometer. 
    • bwiese
      Lower trims ( WT, Custom, Silverado ( aka LT )

      By bwiese · Posted

      My 2026 Silv. 1500 WT (reg cab/short bed/4wd) has the 40/20/40 with storage in lower middle seat as well as the fold-down center bolster/armrest.   With the dual glove boxes this is about as much storage as possible in a std cab IMHO. Bill
    • bwiese
      2026 Silv. 1500 WT reg cab: how many speakers do I have? Is amp module separate?

      By bwiese · Posted

      I have a 2026 base 1500 "WT" regular cab with basic Chevy "Infotainment 3" 7-inch screen/radio. How many speakers do I have If I want to upgrade? Is the audio amp separate from the radio/display unit]? [I listen to classical and it gets a bit raspy at slightly higher volumes. Don't need a sub etc.] Do I have two or 1 speakers in the doors? etc. Thanks Bill  San Jose

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...