Jump to content

GMC Sierra strange noise from Air Conditioning

Harold Rutherford
 Share

Recommended Posts

Harold Rutherford Enthusiast

Harold Rutherford

Posted
Posted

I have a 2016 Sierra SLT Z71 the Air conditioning started making noise after about a year, had it in service 4 times they changes fan, compressor and cabin filter clean system no help. The noise stops when A/C is turned off and the fan still running and starts again when A/C is turned back on gets louder as engine revves. Anyone have an idea what the problem can be? Service can't find a fix and I'm going crazy. The 4 loaner trucks I have been driving while being serviced are very quite. This is my 8th new GMC Sierra first time had a problem.

HoosierZ Enthusiast

HoosierZ

Posted
Posted

How would you describe the sound?

My 2005 Colorado had a whistling sound from the firewall area that turned out to be from an AC line under the hood running along the top of the firewall. It was a design flaw that was replaced with a redesigned line that was relocated along the fender. The noise went away.

Harold Rutherford Enthusiast

Harold Rutherford

Posted
  • Author
Posted

It only starts after A/C runs about 30 seconds, it sounds like a light knocking sound with a light chirping sound it gets faster as engine revs It stops completely when A/C is turned off, the heat is quite so its not the fan (they replaced the fan and A/C compressor under warranty but did not stop noise.) The noise started about 3 months ago was very quite for the first year. I have to give the dealer credit for trying but this is the 4th trip in for the same problem and no one seems to know what it is. The loaner trucks I have been driving are quite no A/C noise.

seamus2154 Enthusiast

seamus2154

Posted
Posted

I am having the same exact issue! The new compressor was a slight improvement but the sound is only there when the compressor is on, It is whirling and is like chinese water torture for me in town. At highway speeds other noise drowns it out. But in town at slow speed especially if the radio is not loud, it will drive you to drink!! 4th truck in this platform, problems with all of them, I have about had it with GM's poor design of basic things. This truck is so improved over the others and I am hating it because of this and the lousy uncomfortable seats in a luxury truck! 

 

 

  • Thanks 1
seamus2154 Enthusiast

seamus2154

Posted
Posted

Doesnt make a sound under the hood all sounds normal till you are in the truck and the ac kicks on. 8ooo miles. ridiculous

  • 5 years later...
Mikesuell4 New Member

Mikesuell4

Posted
Posted

Did you ever find a fix for this? I have the exact same problem. Mine started after i had a new ac compressor installed. A year later I had another 1 installed with a new belt and it has gotten even louder.

  • 1 year later...
DB2017 New Member

DB2017

Posted
Posted (edited)

Hello, I also had a random noise coming from the A/C unit (after changing the cabin air filter) It is best described as a low tone rumbling sound. I pulled the A/C motor out and sure enough, a nut (from a tree) had slipped down into the fan. It was tumbling around when the fan was running. Now looking at it, it is the exact sound you would hear if a tree nut shell was tumbling around a plastic fan😊. Anyway, an hour later she is back together and working great. Saved my self a large amount of money so...thank you everyone. 

PXL_20240617_220302139.jpg

Edited by DB2017
To add a picture
  • Like 1

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

    • StingerZ16
      Wow I'm in a pickle. (Broke down truck) and a story.

      By StingerZ16 · Posted

      Looks tight. Not a lot of working room. Hows yous knuckles?
    • Jsdirt
      2027 GMC Sierra: Official Discussion

      By Jsdirt · Posted

      Spot on. The government makes ridiculous mandates, and this causes manufacturers to jump through hoops for every TENTH of a MPG. Main reason quality is in the toilet and prices are in the stratosphere.   The gov't tightened the MPG requirements so much 5 years ago that the only way manufacturers could meet these absolutely ridiculous numbers was to go all EV. Hence the push.     Nobody hates good MPG, Atlas - nobody is "whining". Your side has that trait all locked up. What a stupid argument attempt!   What I particularly hate is the government meddling in the free market system. Had this system been allowed to work as designed and intended by our Founders, cars and trucks would be hitting numbers that would blow our minds, all while costing 30% LESS. Not only that, but engines could probably hit 150k miles again without needing major internal surgery.   My forty year old Ford 302 has 312k on it. Wonder what changed?🤔
    • revmanii
      Starting a new thread regarding mounting my 2014 OEM wheels to my 2026

      By revmanii · Posted

      The BORA 3/8" spacers arrived yesterday along with the extended lug nuts. I got the front wheels changed out today, but was overheated and covered in sweat so bad, I figured getting both front wheels done was a win, and took a cool shower. Hopefully, I'll go out tomorrow morning before it gets into the 80+ temps and do the backs. After getting the first wheel snugged up, I backed out one of the lug nuts then hand turned to count threads. I believe I stopped counting around 12-13, so I think I'm good there.    
    • Atlas
      2027 GMC Sierra: Official Discussion

      By Atlas · Posted

      My fullsize truck is averaging over 26mpg so I'm pretty happy with the increased fuel economy targets. When I had my gas Silverado (2020 5.3) it was averaging 21. Again, for a fullsize truck, that's very different from the 12-15 these things used to get 30 years ago.   Whine all you want, increased MPG is a good thing.
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That is a fair point, and I think an OBD-first proof is probably the right next step. I agree that the value is not the hardware box by itself. The marketable part would be the software: always-on capture, baseline learning, event reduction, system-specific reports, and alerts. Also agreed that if an OBD device is always plugged in and has local storage, it should not miss the event in the same way that a scanner plugged in after the fact would. The only thing I would not want to assume yet is that an ELM327-class device gives all the late-GM data needed at the rate needed. Standard OBD live data, DTCs, freeze frame, Mode 6, VIN, and calibration information are definitely the right starting point. GDS2 also proves that a lot of useful ECM data can be viewed through the DLC without needing a DTC first. The question I need to test is whether the data needed for a useful GM V8 event report is actually available through the DLC, and at a useful sample rate: - misfire counts / roughness by cylinder - AFM/DFM state - oil pressure and oil temperature - fuel trims - voltage / reset context - U-codes and communication events - calibration / software information - whether these are standard PIDs, enhanced DIDs, Mode 6 data, GDS2-only data, or not available So I think the right benchmark is: 1. Build the OBD-only version first. 2. Keep it plugged in and logging locally. 3. Compare it against GDS2 / freeze frame / HP Tuners or another higher-end logger. 4. Measure which parameters are available and at what update rate. 5. Only justify ECM-side hardware if it captures useful evidence the OBD version cannot. So you may be right: the consumer product might simply be an always-plugged-in OBD event recorder with much better reporting. A question for you: when you say ELM327 devices can already deliver all the data needed, do you mean generic OBD Mode 01 data only, or GM enhanced data as well? For a useful GM V8 report, would generic OBD data be enough, or would you expect the tool to include enhanced items like misfire by cylinder, AFM/DFM state, oil pressure/oil temp, U-codes, and calibration information?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...