Jump to content

High frequency noise coming from dash when in 4WD

grizzlyrafting

By grizzlyrafting
in Troubleshooting & Recalls

Recommended Posts

  • Replies 283
  • Created
  • Last Reply
cmpcpro Enthusiast

cmpcpro

Posted
Posted

I brought my truck in for service and when I got it back I had the high pitched noise.. I drove for 16 miles before I realized they flipped the switch to 4wd auto. As soon as I flipped to 2wd it's gone.

355HP Z71 Enthusiast

355HP Z71

Posted
Posted

My truck makes the same noise in auto and 4 wheel drive. I had the dealership look at it and they told me they couldnt hear it. My brother told me the same thing when I had him drive it. He couldnt hear it either.

  • 2 weeks later...
Arnoldthepig Enthusiast

Arnoldthepig

Posted
Posted

I just took my truck in for FM recorion issue, a squeeking noise under the hood after the engine has been off for hours, a 4wd switch that makes a high pitch squeel and a blown rear shock. The dealer confirmed all my concerns with the exception of the 4wd switch noise. The tech said he cannot hear it...he said he would order a new switch to see if it helps. We did get into a brand new truck on the lot and that truck also made the high pitch noise during the initial switch into 4wd...after the switch to auto or 4wd the noise seemed to go away unlike mine that continues to squeel...

355HP Z71 Enthusiast

355HP Z71

Posted
Posted

A lot of people on here have that high pitched noise . I am thinking its "Chevy Normal"??? My noise is heard all the time in auto or 4 wheel high . Just not when I switch it over from 2 wheel. I am thinking it's some sort of sensor?

Arnoldthepig Enthusiast

Arnoldthepig

Posted
Posted

The noise I hear on my truck is also all the time when in auto or 4 hi...the new truck on the lot could only be heard when initially switching it into 4hi and auto...

The noise I hear on my truck is also all the time when in auto or 4 hi...the new truck on the lot could only be heard when initially switching it into 4hi and auto...

Arnoldthepig Enthusiast

Arnoldthepig

Posted
Posted

No i didnt drive the new truck on the lot, I just flicked it into 4hi and auto with the engine running. The noise was present while making the switch to 4wd but once it went in, it was quiet again...

colton_m Enthusiast

colton_m

Posted
Posted

My truck makes the same noise being described here. 4wd auto, Hi or Lo makes the sound every time. When in auto it kind of pulsates and gets very annoying. When I switch back to 2wd it instantly dissapears.

 

1500 '14 Silverado LTZ Z71

 

1100 km so far

 

I'm 24 and damn is this noise loud. Hopefully it is NOT normal operation...

softail_silverado Enthusiast

softail_silverado

Posted
Posted

Wow I am so glad I found a thread on this. I now know I'm not crazy for hearing this noise. I only have 400 miles on the truck but have been hearing this since the first day. With the radio on it isn't bad but with no hvac or radio on it is quite noticeable. I have only been running the truck in auto because I don't commute far and my driveway is a total mud mess but maybe I will do some experimenting in 2wd and see if it is still there. I didn't even think to put two and two together that it would have to do with the 4wd. I actually shut the truck off the other night took the key out and was still hearing the noise even with the truck turned off.

 

On a side not with this, this is my first vehicle with the auto 4wd. Is it ok to commute around town or highway with the switch on auto? My old 98 I would have to stop and put in 4wd all the time to get up my driveway with the snow and ice and my 14 I haven't had to manually switch yet. But is it ok to keep in auto? Maybe besides this high pitch noise.

Arnoldthepig Enthusiast

Arnoldthepig

Posted
Posted

Well I am glad thats resolved! It turns out that this annoying 4wd sound is "normal" according to the dealership. WOW that makes me feel much better! (Sarcasm Intended) And get this, according to the GM rep I spoke with on the phone and the dealership, they have NEVER heard of this issue. Weird never heard that one before either! :bs:

 

I have owned 6 4wd drive vehicles in my life and have never experienced anything like this. GM is seriously a joke....

drivecontrol Enthusiast

drivecontrol

Posted
Posted

I guess if GM can ignore an ignition switch issue that may lead to death, or shrug off an issue with our gauges going out if a media device title is too big, ignoring a noise that is capable of driving your customers off is no big deal. My next purchase will be Ford, and will be soon.

pm26 Senior Enthusiast

pm26

Posted
Posted

Solution:

 

A free set of ear plugs with instructions to use them when you switch to 4WD or AUTO.

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Gas Prices

      By Atlas · Posted

      Welcome back! No, it definitely doesn't pass the sniff test. Even "ceasefire" needs an alternative definition these days.    $5.29 at Kroger today
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That makes sense, and I think you are describing the real product problem. Capturing data is the easy part. If the owner or technician has to manually dig through five minutes of millisecond-level logs, the product has already failed. The device would be at the ECM harness, not at the OBD port, so I agree that data retrieval and event marking need to be thought through carefully. The way I am thinking about the architecture is: The recorder itself should not depend on a phone, app, Bluetooth, Wi-Fi, or cloud connection to capture the event. It should always keep a local rolling buffer and lock the event locally. A button, phone app, or small cabin device would only act as an event marker. If the driver feels a stumble and presses the button 10–30 seconds later, the pre-buffer has to already contain the useful data. For data retrieval, the practical options would be a sealed service USB lead, Wi-Fi download, or a phone/cabin companion device. I would not expect the owner to remove the ECM-side module or work with raw files directly. The cloud or AI side would be for interpretation, not for capturing the event. The truck may have no connection when the issue happens, so the evidence has to be saved locally first. After that, cloud processing could help decode the data, compare it against baselines, and generate a readable report. For the first version, I would keep the automatic triggers conservative and objective: driver event marker bus-off error passive voltage drop / brownout device reset FIFO or queue overflow a normally periodic message disappearing side-to-side communication mismatch, if the topology supports that For “learning normal,” I agree with your point, but I would not want to overclaim it as automatic root-cause diagnosis at first. A realistic first step would be learned baseline comparison for that specific vehicle and operating condition. For example, a value would only be compared against similar conditions: RPM range load / MAP throttle position gear / vehicle speed coolant and oil temperature battery voltage AFM/DFM state, if decoded and validated Then the report could flag things like: this periodic message disappeared compared with its normal timing this value deviated from this vehicle’s normal range under similar conditions the same abnormal pattern repeated after the same type of event the anomaly occurred together with voltage, oil-pressure, misfire, or communication changes But I would still call that “abnormal pattern detected,” not “replace this part,” unless there is enough validated repair data behind it. So the intended product would not be “here is a huge log.” It would need to be an event package: what triggered the capture how much pre/post data was preserved what changed before and after the event whether the device itself reset, overflowed, or saw a bus error selected graphs around the event raw data only as supporting evidence From your perspective, what would make this kind of report useful instead of just another datalog? For example: What are the top 5 parameters or events you would want highlighted first? Would you trust a learned baseline for that specific vehicle, or would you prefer fixed thresholds? How much false-positive flagging would be acceptable before you stopped looking at the reports? What would a one-page report need to show for an independent shop to take it seriously? For misfire, AFM/DFM, oil pressure, or U-code complaints, what would you want the tool to flag automatically?
    • scotthvac.net
      2022-24 halogen - led grille swap

      By scotthvac.net · Posted

      2024 Silverado 2500 HD LTZ grille no camera Parts list   84603331 84913656 84913657 84913654 84913655 84911567 84911568 85646092 85646093 85797921 85797922   11570637  x10-15   grille/bumper bolts 11546500  x10      grille clips 11571006  x10      push/retainer clips 11546454  x6       nut retainers 11611609  x6       M5 bolts 11610700  x6       molding/trim retainers
    • davester
      Replacement Radiator

      By davester · Posted

      And use RA's 5% discount code if you buy from them.  google for the code, one is always available.
    • davester
      Turning radius

      By davester · Posted

      Just don't turn the steering wheel as much?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...