Jump to content

HISSING BUZZ SOUND - Please Help!

awilley17

By awilley17
in Troubleshooting & Recalls

Recommended Posts

awilley17 Enthusiast

awilley17

Posted
Posted

Hello fellow GM truck owners,

 

Really need some assistance/advice. I'm reposting this because I had only one response and I can't find any other threads that fit my issue.

 

I own a 2015 Silverado 4.3 L with 7000 miles. Two months ago I noticed a minor hissing/buzzing sound coming from behind the dash and or underneath the steering column. The sound is a bit hard to describe, but I would compare it the sound of large volumes of sand being "dumped" that grainy sliding sand sound. I know its a weird description but the best example I could think of.

 

Only happens when the car is put under stress such as accelerating quickly, driving up hills, and its pretty steady when the vehicle is going 70MPH or higher. Also only starts up after the car has been driving for at least twenty minutes.

 

When I am cruising on the highway in the fast lane going about 75-80 MPH the constant hissing is VERY ANNOYING and is always present. It ruins the quiet cabin

 

It BOTHERS me, and I've brought it to the dealership that I bought the truck at twice. First time they didn't hear it. Second time I did a ride along and he noticed it. Came back and they told me it was just a normal "engine noise".

 

Took it to a second dealership for a THIRD time. Did a ride along guy told me a bunch of technical jargon but what I got was is that it was the sound of the engine exhaust.

 

Is it just me. This issue is driving me CRAZY.

 

Appreciate any responses, I'm minor OCD and this sound has been ruining my brand new purchase!

The Zip Senior Enthusiast

The Zip

Posted
Posted

You may want to capture the sound and someone may be able to assist. Guessing the dealer did this, but check to see if your duct work is not defective or securely fastened near and around the air filter.

awilley17 Enthusiast

awilley17

Posted
  • Author
Posted

I'm assuming that the first dealership did this, but they didn't mention that they did. They said they checked my firewall which covers checking my duct work I'm guessing.

The Zip Senior Enthusiast

The Zip

Posted
Posted

The dealer may have been checking your sound deadening on the cabin side of the firewall, but if it was faulty reparing it would not have stopped the sound, only eliminated you from hearing it. Have the dealer look at the duct work and fasteners around the engine air filter. Also, other owners can verify if this is normal or not.

pm26 Senior Enthusiast

pm26

Posted
Posted

The hiss will probably get louder under throttle, but just pop the hood and take a quick look around the air filter, something could just be loose.

Like GM quality control, for example?

awilley17 Enthusiast

awilley17

Posted
  • Author
Posted

I'll have to ask them to look at it. I've popped the hood and looked around but I don't see anything that seems out of the ordinary. Just hate taking my truck to the dealership for a 4th time. It's getting ridiculous.

awilley17 Enthusiast

awilley17

Posted
  • Author
Posted

UPDATE:

 

Just drove my Silverado about 30 miles south on the freeway. Minimal sound, faint but I could hear it obviously since i'm looking for it. On the way BACK the sound was MUCH MORE pronounced.. I mean it was bad enough to where I recorded the sound on my iphone while driving (I know, I know, sorry). The sound was a very pronounced buzzing/hissing. When I got off my exit at the stop light I put the truck in park and hit the accelerator.. sound came back. So it does appear when the vehicle is not moving and the RPM's are revving. The sound only makes its appearance when you press on the accelerator, if I'm going 80, then left my foot off and slowly cruise down the sound disappears.

 

Came home and inspected the underside of the car, and the engine bay above. Couldn't find anything out of the ordinary. Taking it to the dealership first chance I get. Am I really the only one out here experiencing these issues? Seems hard to believe. Just my luck.

pm26 Senior Enthusiast

pm26

Posted
Posted

In case you did not know, GM800 series trucks had gurgling and hissing A/C noises behind the dash occasionally and that was considered normal for the system. I am not sure if newer trucks exhibit the same symptoms, but if it is just related to A/C operation, i would not lose my sleep over it.

awilley17 Enthusiast

awilley17

Posted
  • Author
Posted

It does resemble a gurgling/hissing. I wondered if it was my AC. It's just the gradual increase in sound that bothers me, and the sound itself is somewhat loud and it ruins the experience for me cause I can't stop noticing it. Also this may be a dumb question but when I'm not running my AC unit would it still make that noise?

pm26 Senior Enthusiast

pm26

Posted
Posted

It does resemble a gurgling/hissing. I wondered if it was my AC. It's just the gradual increase in sound that bothers me, and the sound itself is somewhat loud and it ruins the experience for me cause I can't stop noticing it. Also this may be a dumb question but when I'm not running my AC unit would it still make that noise?

If the A/C is off and the noise was caused by the A/C operation, then obviously no.

awilley17 Enthusiast

awilley17

Posted
  • Author
Posted

Once I get my truck fixed from my recent collision I'm taking it back to the dealership. For the 4th time. Going to have them look at both sides of the firewall and look at my air filters. So sick of this shit. Really starting to think I should have gone with dodge or ford.. This belief will be solidified if they come back and can't find anything. Whenever I hear the sound while driving it makes me want to punch something in the face hard.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,847
    Total Members
    8,960
    Most Online
    FiLo
    Newest Member
    FiLo
    Joined

  • Who's Online   5 Members, 0 Anonymous, 655 Guests (See full list)

  • Latest Articles

  • Posts

    • wassupdoc
      Wiper Blade Replacements

      By wassupdoc · Posted

      sorry to bump an old thread, im a bit clueless with this stuff, would these fit a 2019+ Silverado? https://wiperpro.com.au/products/chevrolet-silverado-wiper-blades mainly wondering if the beam shape stays planted at highway speed, thats what seems to let the factory ones down imo
    • mysery1
      What have you done to your K2 today?

      By mysery1 · Posted

      I have a 2018 Silverado Custom with 156k on the odometer. In the last month I've replaced the plugs, wires and the driver side engine mount. My wife just returned from a trip of about 1500 miles and told me the brakes are making a grinding noise when applied. I drove it and looked it over and this is what I found with the driver's side rear rotor.   I'm going to order new pads and check about having the rotor resurfaced. Hopefully this is easier than the last 2 jobs.   Peace  
    • FiLo
      5.3 / 6.2 valve covers / oil burning

      By FiLo · Posted

      Any update if the new valve cover help with the oil consumption?  I have a 2014 GMC sierra and my truck is consuming a lot of oil so I’m wondering if replacing the driver side valve cover will stop some of the oil consumption. Thanks 
    • Deadwood
      primary drive belt tensioner

      By Deadwood · Posted

      I bought belts and pulleys for my '20 L5P at Rock Auto a couple years ago. I have used them for many years, and almost always save significant money, especially when I buy maintenance stuff ahead of time.   They carry many OEM parts, which is all I use unless an aftermarket is shown to be same/superior, or if it is an insignificant part or unavailable OEM part anywhere else. RA is usually lower priced, often by a bunch, but parts are sometimes unavailable or out of stock, and I do shop around and sometimes find better prices at other sites.   Be aware that you pay shipping, and if you buy multiple items and they are coming from different warehouses, the shipping can kill the advantage. Planning ahead is best if possible.   If you have a transmission service in the near future, check out their OEM (AC Delco ULV) fluid, usually MUCH less than anywhere else.
    • Deadwood
      10L1000 anyone with High Mileage ? I hate Damocles....

      By Deadwood · Posted

      New member here, very long time occasional guest. Saw this thread, thought it would be a good time to contribute someting. It is only my experience and not a claim that everyone will have the same.   I bought my '20 3500 L5P new and have put 99.9% (literally) of it's current ~400k miles on it myself, with over 50% of that towing loads between 4k to 15k, and to me this truck has been nothing short of amazing. For the first 235k I had zero issues, and from there until 321k I replaced a NOx sensor, two failing glow plugs, and three of the notorious injector connectors. I believe this truck is in part, a testament to good luck, but also good care and following a decent maintenance schedule (I also keep meticulous records.) As a result, it looks as good as a well cared for 70k rig, up and down, inside and out.   At some point before that 321k mile mark I began to get a little spooked about the 10L1000, especially the valve body. Word of mouth about potential issues prompted me to jump on the net to sift through all the noise and determine what all the fuss was about. I routinely take long trips, coast-to-coast and points in between, so roadside breakdowns can be '...a thousand miles from nowhere' and a bit of a challenge, and though I had no issues, my guard was up and activated.   And then I stumbled across a chance to salvage some parts off a new 2025 that had been wrecked in transport. I grabbed a few wear items (alternator, pulleys, etc.) and on a whim asked what the ten speeder would cost me. It was cheap...really cheap. I knew some changes had been made in the '24+ version 10L and were supposedly not compatible, but I called service/parts at my local Chevy dealer and asked why and they didn't know. A call to a well known aftermarket transmission outfit revealed it was very likely it would be fine, but to them not 100% sure.   Because it was cheap (really cheap) and I was spooked, I took the chance. Had it installed by a local shop and it worked like a champ, shifted just like the original. At it's first service at 37k, I had the shop put in a Next Gen valve body kit, which after some initial hiccups and rough shifts, smoothed out though with somewhat firmer shifting.   All that said, I have a very serious concern about my newer transmission as just two weeks ago it suddenly began to exhibit a strong reluctance to engage forward or reverse. It was a bit past due anyway so I took it in for service. The reason it was sticking was due to 'glitter' in the fluid clogging the filter...not good folks, often indicates a converter giving out. We ended up going ahead with the new filter and fluid, first to see if it would move and shift, and then if so buy me a little time. It did, and I've driven it over a thousand miles and it is shifting smooth, no noises or slipping. Regardless, it looks like a third gearbox is in my future so I can resume taking long trips with some confidence. In the very short term, my curiosity will have me examining the fluid to check how much glitter has reappeared.   An earlier poster had alleged, in the context of 10L100 failures, that it is another example of how we seasoned citizens somehow descend into hysteria, lose control of our senses, and react irrationally after brief encounters with the idiocy of the internet infosphere. Let me say (and I have used and abused said internet since it's infancy) there is no segment of the populace that has a corner on over-reaction to digital garbage. Just as my offering of experience in this arena is purely anecdotal and should not be considered gospel or all-encompassing, I believe it is still worthwhile information to consider, along with other relevant anecdotal experiences about things like complex transmissions, especially when balanced with other sources.   So to answer the original question, yes I got high miles out of my first 10L, trouble free for 321,000. Now I really wonder how much longer it would have went. Did I 'overreact' to the internet ghouls by replacing a 'good' one with a 'bad' one? Maybe. Who knows, the thing might have taken a puke a 100 miles later. So I'll just fix it again, then move on and start thinking about all the other stuff that will eventually wear out. It still has the original brakes (they're at ~60%), original injectors/pump, turbo, water pump, etc....pretty much original everything. Knock on wood.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...