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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs/Problems

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Old 12-03-2007, 10:44 AM
jmlea0 jmlea0 is offline
2003 Chevy TrailBlazer LTZ
Summit White 4.2L I6 4X4
Join Date: Nov 2007
Location: Cohasset, Ma
Posts: 188
Whining noise

Hi guys my dad has a 2006 TB SS with about 45k on it. Ever since he bought it there has been this kinda weird whinning noise coming from the engine when he accelerates and we have always assumed it was the intake/ air cleaner or something. Kinda was sounding like the noise a turbo would make. Not sure if this is normal. Nothing has gone wrong yet but when he went top the dealer the mechanic got all nervous and said to bring it in so they could check his transfer case. Just checking to see if anyone else gets this noise and to worry about it or not?
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Old 12-03-2007, 10:58 AM
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Fishhunter911 Fishhunter911 is offline
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2007 GMC Yukon SLT
Onyx Black 5.3L V8 4X4
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Location: Delaware
Posts: 11,894
It happens on all of them. It is the Alternator pulley clutch..... nothing to worry about.

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Old 12-03-2007, 01:02 PM
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SpotBlender SpotBlender is offline
2008 Chevy TrailBlazer SS
Red Jewel Tintcoat 6.0L LS2 V8 2WD
Join Date: Oct 2007
Location: Houston, TX.
Posts: 126
I was starting to worry about that noise also, I have 3500 miles on mine.

Thanks for the piece of mind Fishhunter911.
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Old 12-03-2007, 03:46 PM
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treyster treyster is offline
2006 Chevy TrailBlazer SS
Superior Blue Metallic 6.0L LS2 V8 AWD
Join Date: Jul 2006
Location: Columbus, OH
Posts: 441
Is the noise related to engine rpm or vehicle speed?
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Old 04-15-2008, 01:25 PM
JeremyM JeremyM is offline
2005 Chevy TrailBlazer LS
Dark Green Metallic 4.2L I6 4X4
Join Date: May 2007
Location: Syracuse, NY
Posts: 100

Mine does the same..2005 TB LS with about 43k on it. Definitely coming from the engine area and is associated with RPM. Whether rolling or not, in gear or park or nuetral, gets higher and louder as I increase RPM's.

Any ideas? It's been like this for a while now..since I started using 4wd this winter.

Eeek! Didn't realize this was the SS forum..just clicked on this thread from search results. Will post in the regular forum..te-he-he
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Old 04-15-2008, 04:22 PM
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rbarrios rbarrios is offline
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2003 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 2WD
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mine has a slight whine... been like that since I can remember... and I now have 122,600 miles.... no problems yet..
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Old 04-15-2008, 04:48 PM
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blackbowtie22 blackbowtie22 is offline
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2005 Chevy TrailBlazer LS
Graystone Metallic 4.2L I6 2WD
Join Date: Mar 2008
Location: Lincolnton, NC
Posts: 88
i had mine fixed recently...bad bearing in the idler belt pulley...it was under warranty so im not sure about $$$
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Old 04-15-2008, 05:19 PM
Senior Member
2007 Chevy TrailBlazer SS (3SS)
Summit White 6.0L LS2 V8 4X4
Join Date: Dec 2005
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Posts: 767
I had the same noise on mine...it was the idler pulley...$20 part and an easy fix.
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Old 03-05-2009, 10:20 PM
harvman77 harvman77 is offline
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Join Date: Mar 2009
Posts: 2
whining trailblazer

i had a similar problem where my trailblazer was whining. i took it in and it was the tensioner pulley. the par cost $39 and i had it fixed for a total of $100. the garage only took 30 minutes for labor. quick fix for an affordable price. hope this helps!
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Old 11-10-2009, 03:54 PM
mctrailblaz mctrailblaz is offline
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2006 Chevy TrailBlazer LS
Dark Gray Metallic 4.2L I6 2WD
Join Date: Nov 2009
Location: JENSEN BCH, FL
Posts: 8
Trailblazer Siren/whining noise.

It simply drove me nuts. It started very early on. I have a 2006 with only 45k miles and it started around 20k.

Fix is as described above.

Part used: Dayco Idler Pulley
Part Number: 89059
Price: 20.49 + tax
Store: Advanced Auto Parts

Link = http://shop.advanceautoparts.com/web...S_542589891___

In my case the washer fit just fine.

I went to Lowes and bought their breaker bar as follows:
1/2 Breaker bar (the 3/8 one was too short to get any leverage)
1/2 to 3/8 reducer


The same tool will come in handy replacing the belt, alternator etc.

Wrong tool will cause you nightmares. Trust me I tried in Spain to take a belt off without a breaker bar and it was a nightmare.

So for 50 bucks ( that includes a new tool) NO more whining.

It was like night and day!

Thanks only to the good folks in this forum was I able to get it done in ten minutes and done right. So thanks a lot. Which is why I decided to tell my story. So that others can rest assured that the guide contained in this thread is simply awesome!!

Thanks a million!! Too bad folks from other countries are not as kind as those from the good old USA.
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