2007blkSS

iTrader: (2)

It seems that when I'm sitting at idle and i have my ac turned on it makes a weird noise and than seems to be vibrating enough to be vibrating my brake and gas pedal it seems like, but when i turn the ac off or start to drive the problem is gone, as soon as its turned on theirs a problem. Anyone know what this is

2009CobaltLT

iTrader: (4)

AC takes power from the motor, causing it to idle a little lower and work harder. this is normal

2007blkSS

iTrader: (2)

It just started doing this like two days ago it didn't do this before..

reduf99

iTrader: (2)

i have a problem with my A/C Too

















i dont have any but good luck if there is a problem fixing it

Chevrolet Cust Svc

2007blkSS,
I understand you are looking for insight into what is causing the noise/vibration at idle when you're running your A/C; while I am unable to offer any technical insight, I am available to you should you decide to work with a dealership to get this diagnosed. Let me know via private message!

All the best,
Sarah
GM Customer Service

jp1600

iTrader: (2)

I swear I see one of these a day now!

gd60

Bump
I'm going to start my own thread about this.

I have the same issue per say. However I feel this vibration at all times. It feels like the clutch is enguaging and then dis enguages all of a sudden. There is really no cold air comming out, the motor stumbles and fights the clutch... When I turn the AC button off everything is fine again. Leads me to believe it has something to do with the clutch. Would low freon levels cause something like this? I'd have to assume no. If it was empty it should still spin the compressor just not provide any cooling.

Someone know what this could be?

Shogokuma

i had my entire ac replaced last year under warranty

Chevrolet Cust Svc

Good afternoon,

Welcome to the forum! I work with GM Customer Assistance, and see that you're from Canada. Should you ever need to contact GM of Canada (they can help you work with a dealership towards hopefully resolving this and other concerns), they can be reached at 800-263-3777 (Hours: M-F 7:30am - 11:30pm, Sat 7:30am - 6:00 EST).

All the best,
Sarah
GM Customer Service

Shogokuma

finally the tech at chevy thinks its the tensionner

tpete763

iTrader: (2)

Either low or hihg amounts of freon could cause this. I had too much in my system and the clutch used to kick in for like 10 seconds, the air would get cold then it would kick off again. Too much pressure in the system cause my problems 2 summers ago. I fixed it and it has been fine since I let some out (which you not supposed to release into the air).

06SS ALL DAY

This is not normal. Don't listen to that guy. My car runs the same on or off AC. You might need to recharge the system. What's your vacuum at at idle with AC?

06SS ALL DAY

The reason your car shakes is probably because of the mounts you have installed. One of the reasons I refuse to get aftermarket mounts. I invested in a thing called boosted reduction lol so I can retain the little comfort the ss provides haha.

G5GT2007

my car when i turn the ac on you here the click then the rpms jump down then go right back up and the fan kicks . it smells like feet its so gross. My dealer was no help.

06SS ALL DAY

The Rpms will jump a little because of the obvious. If its repeatedly kicking on I.e every 2 seconds you need a recharge. The smell however, when's the last time you changed your cabin filter?

Chevrolet Cust Svc

If this was something you were planning on getting looked into by one of our dealerships, please let me know as I'm here to assist in whatever ways I can.
Best,
Sarah
GM Customer Service

G5GT2007

cabin air filter is new Because i thought that was the issue.

I took it to the dealer while it was still under warranty and they told me they needed to clean the hvac under the hood and it would be $250 to clean it. I'm now out of warranty.

Brian's07SS

I did the same thing to mine because of the horrid smell when the AC is first turned on, but then the smell goes away after its been on for about a minute. I'll bring mine to the dealer to see if they can do anything.. out of warranty too..

SSlobalt

They're just going to clean the condenser fins, or they're going to flush out the A/C system due to bacteria? If they're just going to clean the condenser fins, you can do that with a high pressure sprayer.

SSlobalt

You could have bad mounts. It could also be a laboring compressor. You might have a slight leak that caused some of the PAG oil to leak out and now the compressor is starting to labor because of it. Have you seen any areas under the hood, around the A/C components, where there looks to be an oily spot?

06SS ALL DAY

Twice in the ownership of this car since basically when I joined CSS.net. I turned on the AC and white odorless smoke almost came out of the vents for about 3-4 seconds then it cleared. But it wasn't smoke because it dissipated in the air as it rose. So I imagine it was condensation? Can anyone confirm or if that happened to anyone else? Hope it wasnt anthrax lol

Chevrolet Cust Svc

Hope all goes well at your dealership! Let me know if you would like for me to look into anything further for you.

Best,
Sarah
GM Customer Service