**Resolved** Weird intermittent humming noise... - Saturn Outlook Online Community
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post #1 of 40 (permalink) Old 03-08-2011, 08:01 AM Thread Starter
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**Resolved** Weird intermittent humming noise...

I have a weird hum that comes and goes while I'm at highway speeds. I can be driving down the freeway with the cruise on, and it'll all of the sudden appear. It sounds like there's a car with no muffler driving directly next to my driver's door. It changes pitch with speed, and as I slow down on an exit ramp, the frequency of the hum gets longer, almost like it's the brakes or something. However, tapping the brakes at freeway speeds doesn't help or make it worse.

First I was thinking tire balance, but I'm baffled since it's so intermittent and can get so loud! I noticed it the first time when I was towing two snowmobiles, and thought it was just hitch vibrations, now it's happening without towing anything. Have had an alignment done since it first started.

Any ideas??

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
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post #2 of 40 (permalink) Old 03-08-2011, 08:04 AM
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Re: Weird intermittent humming noise...

I'll bet it is the carrier bearing for the drive shaft.




'09 OUTLOOK 1XR FWD, SOLD!<br />'13 Chevy Suburban 4X4 Crystal Red Tintcoat, Ebony 8 seater<br />'05 VUE 3.5L AUTO<br />'08 GMC SIERRA CREW Z71 LC9 Sonoma Red with ebony 6 seater
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post #3 of 40 (permalink) Old 03-08-2011, 09:42 AM Thread Starter
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by 6Sixathome
I'll bet it is the carrier bearing for the drive shaft.
Would that by chance be covered by the powertrain warranty?? I'm at 36,600 miles...so maybe they'd work with me under b2b. If not, how do you diagnose and how hard is it to change out?

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
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post #4 of 40 (permalink) Old 03-08-2011, 10:29 AM
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by bloc0102
Would that by chance be covered by the powertrain warranty?? I'm at 36,600 miles...so maybe they'd work with me under b2b. If not, how do you diagnose and how hard is it to change out?
Read here http://www.gm.com/total-confidence/v...dId=gm&src=sch

I would think that it is covered. I've changed them before on an old pick-up and it was'nt too bad, not sure how it would go on an OUTLOOK.




'09 OUTLOOK 1XR FWD, SOLD!<br />'13 Chevy Suburban 4X4 Crystal Red Tintcoat, Ebony 8 seater<br />'05 VUE 3.5L AUTO<br />'08 GMC SIERRA CREW Z71 LC9 Sonoma Red with ebony 6 seater
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post #5 of 40 (permalink) Old 03-08-2011, 11:23 AM Thread Starter
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by 6Sixathome
Read here http://www.gm.com/total-confidence/v...dId=gm&src=sch

I would think that it is covered. I've changed them before on an old pick-up and it was'nt too bad, not sure how it would go on an OUTLOOK.
Thanks! Gotta be honest though, I'm seriously considering selling this thing after having steering gear replaced, strut mounts replaced, sunroof replaced, transmission cooler leak, PS leak........and now this all by 36k!

Think the 2011 Acadia's are any better? I love the Lambda and get GM supplier pricing.

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
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post #6 of 40 (permalink) Old 03-08-2011, 04:15 PM
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by bloc0102

Think the 2011 Acadia's are any better? I love the Lambda and get GM supplier pricing.
Yes I do, and if you can get out of decent enough than go for it It's too bad that they are worth 3K to 5K less than the same ACADIA






'09 OUTLOOK 1XR FWD, SOLD!<br />'13 Chevy Suburban 4X4 Crystal Red Tintcoat, Ebony 8 seater<br />'05 VUE 3.5L AUTO<br />'08 GMC SIERRA CREW Z71 LC9 Sonoma Red with ebony 6 seater
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post #7 of 40 (permalink) Old 03-09-2011, 01:09 AM
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Re: Weird intermittent humming noise...

Take a look at your tires; check the sidewalls to see if there is any bulging. You may have a cord inside the tire that is broke. I had this happen on my Taurus; made the same sort of sound until I blew the tread off the right rear tire at 70 mph. The shock of the tread separation jarred the fuel cut off switch and made the engine shut down...............just an idea

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post #8 of 40 (permalink) Old 03-09-2011, 07:59 AM Thread Starter
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by AA/78U
Take a look at your tires; check the sidewalls to see if there is any bulging. You may have a cord inside the tire that is broke. I had this happen on my Taurus; made the same sort of sound until I blew the tread off the right rear tire at 70 mph. The shock of the tread separation jarred the fuel cut off switch and made the engine shut down...............just an idea
Thanks...did it come and go? Drove around yesterday with no issues. It's definitely gone more than it's there.

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
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post #9 of 40 (permalink) Old 03-10-2011, 12:20 AM
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by bloc0102
Thanks...did it come and go? Drove around yesterday with no issues. It's definitely gone more than it's there.
It started out that way; the noise would come and go. Eventually the noise was constant and I could never figure out what was causing it till the tire let loose. I'm not saying this is your exact problem; just putting in my .02

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post #10 of 40 (permalink) Old 03-11-2011, 07:50 AM Thread Starter
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Re: Weird intermittent humming noise...

Quote:
Originally Posted by AA/78U
It started out that way; the noise would come and go. Eventually the noise was constant and I could never figure out what was causing it till the tire let loose. I'm not saying this is your exact problem; just putting in my .02
Just thought of something, I've rotated my tires since it started, and it still sounds like it's in the same spot. Does that eliminate this possibility?

Hauling the snowmobiles 400 miles this weekend, we'll see if it gets any worse.

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
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