**Resolved** Weird intermittent humming noise... - Page 2 - Saturn Outlook Online Community
Reply
 
LinkBack Thread Tools
post #11 of 40 (permalink) Old 03-11-2011, 11:07 AM
Senior Member
 
Join Date: Jan 2009
Posts: 396
Re: Weird intermittent humming noise...

If the problem is actually in the tire; then the sound should "move" with the tire rotation. Let us know how the tow goes this weekend

Former Acadia Commander; now Impala Herder<br />2014 Impala LS (non-eco)<br />Acadia moderator<br />Traverse moderator<br />Member # 392
jsimms is offline  
Sponsored Links
Advertisement
 
post #12 of 40 (permalink) Old 03-14-2011, 10:04 AM Thread Starter
Member
 
Join Date: Oct 2008
Posts: 61
Re: Weird intermittent humming noise...

Quote:
Originally Posted by AA/78U
If the problem is actually in the tire; then the sound should "move" with the tire rotation. Let us know how the tow goes this weekend
The noise came about 10 miles into the trip each way, and only lasted for 5 miles or so. On the way back, it was fine until I had to hit the brakes, then it immediately started. It was also definitely worse when I was on the brakes, but still went away after about 5 miles.

So, could this be brake related? Could something be sticking? Or maybe hitting the brakes reasonably hard shocked whatever is making the noise into making noise...

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
bloc0102 is offline  
post #13 of 40 (permalink) Old 03-14-2011, 02:56 PM
Senior Member
 
Join Date: Oct 2009
Posts: 754
Re: Weird intermittent humming noise...

check to see that theres no rocks stuck around the rim/brakes/rotor.
Sticking caliper.
Wheel bearings.

as for the rock. Once crossed at a muddy crossing- where my Trailblazer sank into the mud (on a roadway)- tires were into the thick mud about 1/3 way up the tire.
Finally crossed.
Once on the road again- while braking- you could hear a harsh grinding sound...
checked- and round a rock up agains the rotor.

2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
rbarrios is offline  
post #14 of 40 (permalink) Old 03-14-2011, 03:51 PM
Senior Member
 
Join Date: Nov 2007
Posts: 1,093
Re: Weird intermittent humming noise...

Maybe the best thing to do is take off each tire 1x1 and do a through look see.




'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
6Sixathome is offline  
post #15 of 40 (permalink) Old 03-15-2011, 08:10 PM
Senior Member
 
Join Date: Feb 2010
Posts: 131
Re: Weird intermittent humming noise...

Could be brake related... remember when in Drive (vs. 'L') the brakes are applied when you let off the gas, a.k.a "Brake Assist", so it could be a slightly warped front rotor. I had to replace mine @ 28k miles, but than again, you can typically feel warped rotors through the steering wheel under braking.

During this event, are you getting any feedback through the steering wheel?

'09 XR, AWD, all options except rear DVD entertainment
XRDreamliner is offline  
post #16 of 40 (permalink) Old 03-16-2011, 09:44 AM Thread Starter
Member
 
Join Date: Oct 2008
Posts: 61
Re: Weird intermittent humming noise...

Quote:
Originally Posted by XRDreamliner
Could be brake related... remember when in Drive (vs. 'L') the brakes are applied when you let off the gas, a.k.a "Brake Assist", so it could be a slightly warped front rotor. I had to replace mine @ 28k miles, but than again, you can typically feel warped rotors through the steering wheel under braking.

During this event, are you getting any feedback through the steering wheel?
Really? What about when the cruise is on? I do notice a very slight wobble in the wheel while under braking, but inspected the rotors ~5k miles ago and they were fine. I do not get any feedback in the steering wheel while the noise is present; I do not notice anything different when it's there vs when it's not.

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
bloc0102 is offline  
post #17 of 40 (permalink) Old 03-16-2011, 01:27 PM
Senior Member
 
Join Date: Oct 2009
Posts: 754
Re: Weird intermittent humming noise...

actually when in D- and going downhill- there will be descent control- which uses engine braking/trans to help slow the vehicle. Youll see the RPM's go up etc. Thats why many people report they cant 'cruise' down a hill without the RPM's going up.

When in L- this feature is turned off. so its easier to just cruise down the hill....
Now-- if it is a LONG hill with no traffic- cool-- cruise on down with safety.
If its a long hill with twists/turns/traffic- I recommend you leave it in D- this will allow the engine to do its engine braking- and help keep your brakes cool to avoid brake fade.

The Lamdbas do not have Brake assist/ hill assists-- that will hold the vehicle (say at a stop on a hill) while you move your foot from brake to gas.

2010 FWD LT1-Gold Mist Metallic- seats 8.<br />Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.<br />2013 Equinox 3.6L -&nbsp; &nbsp; 16,755<br />2010 Traverse 3.6L-&nbsp; &nbsp; 74,300<br />2003 Trailblazer 4.2L-170,500
rbarrios is offline  
post #18 of 40 (permalink) Old 03-17-2011, 02:22 AM
Senior Member
 
Join Date: Feb 2010
Posts: 131
Re: Weird intermittent humming noise...

Quote:
Originally Posted by rbarrios

The Lamdbas do not have Brake assist/ hill assists-- that will hold the vehicle (say at a stop on a hill) while you move your foot from brake to gas.
I stand corrected... it has "Panic Brake Assist", not "Brake Assist", and the fore-mentioned Hill-Descent. Probable cause: a late night and too much at Happy Hour.

You say you inspected the rotors... with a run-out gage? If you do get a slight wobble only with the brakes applied, odds are good you have a "warped" rotor (vs. an out-of-balance wheel). The "warped" rotor, as exhaustively explained on the StopTech website, is a rotor that has developed high spots of brake material which cause the brake pads to not ride flat on the rotor surface.

Could it be your problem? Maybe so, maybe not...

'09 XR, AWD, all options except rear DVD entertainment
XRDreamliner is offline  
post #19 of 40 (permalink) Old 03-17-2011, 09:25 AM Thread Starter
Member
 
Join Date: Oct 2008
Posts: 61
Re: Weird intermittent humming noise...

Quote:
Originally Posted by XRDreamliner
I stand corrected... it has "Panic Brake Assist", not "Brake Assist", and the fore-mentioned Hill-Descent. Probable cause: a late night and too much at Happy Hour.

You say you inspected the rotors... with a run-out gage? If you do get a slight wobble only with the brakes applied, odds are good you have a "warped" rotor (vs. an out-of-balance wheel). The "warped" rotor, as exhaustively explained on the StopTech website, is a rotor that has developed high spots of brake material which cause the brake pads to not ride flat on the rotor surface.

Could it be your problem? Maybe so, maybe not...
I did not use a run-out guage, don't know if the dealer did or not when they rotated the tires and I asked them to check them out as well. I've had the very slight wobble for 5k miles before this started happening. I would say it is a possibility, but it was only the last time that it happened when I applied the brakes. Every other time it comes while I'm cruising down the highway and the brakes didn't make it worse. Maybe it's gotten worse to the point that the brakes will now cause it? Just weird that it comes and goes like that, like something has to get to a certain temperature for it to happen and any time it's cooler or hotter it doesn't do it. It also only happens at freeway speeds.

Hasn't happened at all this week, but I've just been going the 8.5 miles to and from work.

-SOLD- 2008 Outlook XE AWD<br />Carbon Flash/black cloth<br />Conv Pkg/Pref Pkg/Sunroof<br />Outdoor Adv Pkg/Tow Pkg
bloc0102 is offline  
post #20 of 40 (permalink) Old 03-17-2011, 11:23 PM
Senior Member
 
Join Date: Jan 2009
Posts: 396
Re: Weird intermittent humming noise...

bloc

what is the outdoor adventure package as listed in your signature?

Former Acadia Commander; now Impala Herder<br />2014 Impala LS (non-eco)<br />Acadia moderator<br />Traverse moderator<br />Member # 392
jsimms is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Saturn Outlook Online Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome