2016 Suburban Loud A/C

GhettoSled · July 30, 2018

I just changed the cabin air filter in my 2016 Suburban. Before the filter change, there was the normal noise when the A/C system was on. Now, there is a HORRIBLE humming sound coming from the vehicle. It is so loud, that you can hear it outside of the vehicle. I popped the hood and you can hear it near the passenger side firewall, sounds like a sucking sound. I read on here where debris can fall into the system when you change the filter, so I checked that. Nothing. The noise began instantly after changing the cabin air filter. What have I done to my Suburban? It makes it miserable to drive now.

mjm-1957 · July 30, 2018

You dropped an acorn or some other crap into the blower motor. You can't believe how often this happens.

GhettoSled · July 30, 2018

I tried my best to check that, even shoved a ShopVac hose down the opening and no luck, still noisy as ever.

mjm-1957 · July 30, 2018

Get a small telescoping bendable mirror and have a good look at the squirrel cage

GhettoSled · July 30, 2018

Okay. I'll try that in the morning. At work right now. Thank you!

Supreme Pizza · July 30, 2018

Try removing the filter. It could be defective. A loose seam "flapp'n in the wind".

GhettoSled · July 31, 2018

Ok, gave it a shot again this morning. Removed the filter and turned the system on, hum is even louder with the filter removed. Filter reinserted and the noise is still present. Tried everything I could try to remove any debris that may have fallen in there and nothing comes out and cannot see anything in there. Noise is driving me insane. I actually want to set this thing on fire now. J/K of course, but almost to that point.

GhettoSled · August 16, 2018

UGH. I took it to the dealership the other day and they claim to have vacuumed it out and the noise is still present. How do I fix this? Please help me before I go insane.

Downsea · August 16, 2018

I had the exact same problem. Does the sound change when you use different doors? Floor, defrost etc? Did you use a Fram filter? I did, same problem your'e having. I pulled the filter 6 times, no kidding. The final time I made sure all air and blower was off and the air flow on the filter was correct. When I put it back in I went through all the doors with the blower on low and it quit. I don't know why. It quit though. Sorry about the problem.

BurbanDriver · July 8, 2021

Hi Ghettosled, I’m literally in the same boat. 2016 suburban changed the air filter, which had a mouse nest, and now I have the worst sound coming from what seems like the compressor. Did you find a solution?