loud whirring noise - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

General If it doesn't fit in any other forum

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
  #1  
Old 10-02-2009, 11:27 AM
fasheeryfo fasheeryfo is offline
Junior Member
 
2002 Chevy TrailBlazer LS
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Nov 2008
Location: West Bath, ME
Posts: 79
loud whirring noise

when I accelerate (I also put the car in neutral and revved) so basically when the RPM's go up, my car is making a whining/whirring noise. It was perfectly fine until this morning when I got in it.

got in my car, started it up. No noise
put in reverse, when applying the brakes after backing out of my parking spot, started shaking/shuddering and then when I applied the gas, started whining kind of a high pitched noise or like the whine of a vacuum cleaner. Any suggestions?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 10-02-2009, 11:32 AM
antiminivan antiminivan is offline
Junior Member
 
2003 Chevy TrailBlazer LT EXT
Black 4.2L I6 4X4
Join Date: Dec 2008
Location: outside Philadelphia, PA
Posts: 52
If it's linked to engine speed, a likely (and inexpensive) culprit is the idler pulley.
Reply With Quote Quick reply to this message
  #3  
Old 10-02-2009, 01:25 PM
the roadie's Avatar
the roadie the roadie is offline
No longer with us
 
2004 GMC Envoy SLT "Roadiemobile"
Extreme Offroad Pewter 4.2L I6 4X4
Join Date: Apr 2005
Posts: 26,181
But the shaking/shuddering could also be a failing/failed PS pump, water pump or AC compressor bearing.

Best to pull the serpentine belt (search for many threads discussing how - it's simple) and turn pulleys by hand and see if any of them are grinding.
Reply With Quote Quick reply to this message
  #4  
Old 10-02-2009, 03:42 PM
fasheeryfo fasheeryfo is offline
Junior Member
 
2002 Chevy TrailBlazer LS
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Nov 2008
Location: West Bath, ME
Posts: 79
I will look into that when I get home from work.

On a side note, my dad heard the noise and was like sounds like your power steering fluid... I dunno how the increased RPM's would affect the sound if that were the issue, but it turns out the power steering fluid was pretty dry (still wet inside but no visible level of fluid)

could this have anything to do with it?

**just realized you said something about the PS pump, i didn't make the connection before haha**
Reply With Quote Quick reply to this message
  #5  
Old 10-02-2009, 04:19 PM
antiminivan antiminivan is offline
Junior Member
 
2003 Chevy TrailBlazer LT EXT
Black 4.2L I6 4X4
Join Date: Dec 2008
Location: outside Philadelphia, PA
Posts: 52
Quote:
Originally Posted by fasheeryfo View Post
I will look into that when I get home from work.

On a side note, my dad heard the noise and was like sounds like your power steering fluid... I dunno how the increased RPM's would affect the sound if that were the issue, but it turns out the power steering fluid was pretty dry (still wet inside but no visible level of fluid)

could this have anything to do with it?
Absolutely. The PS pump is belt driven, so it would be spun faster as the engine spins faster.
Reply With Quote Quick reply to this message
  #6  
Old 10-03-2009, 10:05 AM
fasheeryfo fasheeryfo is offline
Junior Member
 
2002 Chevy TrailBlazer LS
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Nov 2008
Location: West Bath, ME
Posts: 79
put in fluid, turns out I have a leak that is dripping down somewhere near the drivers side tie rod.
The noise stopped when I put the fluid in and it doesn't seem like my power steering is going, should I replace the pump or could it be a line or something?

The drip doesn't seem to be too serious, I filled the resevoir to the "H" line on the dip stick, today it is at the "C" line like 3-4mm less than yesterday. It's been about 15 hours of sitting overnight and an hour of driving altogether after putting the fluid in yesterday.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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

Forum Jump


» Sponsors

Advertising Info

All times are GMT -4. The time now is 03:28 PM.


Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed