Question about 2006 GMC Envoy

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When I start my '06 Envoy, it makes a high pitched squealing/whistle noise for about the first 30 seconds and slowly fades away. It does this every time I start it. What could be causing this?

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  • 174 Answers

Bad belts bearings ,bad water pump/alternator bearing,sleppery (loose) belt,worn belt,worn pulley.Best guess:timing belt tension bearing,loose alternator -belt slip.

Posted on Oct 21, 2013

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Have you checked the tension on the alternator or any other belt drive in the engine bay?

Posted on Oct 21, 2013

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Posted on Jan 02, 2017

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SOURCE: high pitch whistling noise in engine compartment of 2005 envoy

There may be a small hole or cut in a vacum line or possibly just loose. Also make sure the air filter box and the big hose to it are secure and clamps etc are tight. Pulleys and belts can make a high pitch sound also.

Posted on Mar 22, 2009

emissionwiz
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SOURCE: Secondary air pump located on frame under driverside on 2004 Envoy makes a loud hih pitched noise after cold start. Goes away after about 5 seconds. Can this be repaired or does it have to be replace

The pump is designed to run when engine is cold to clean up the exhaust, they do make a high pitched noise and this is not abnormal in any way. They are very much like a high speed blower dryer in the way they move air. You can't replace parts in them, they are sold as one unit cost about $210.00 US. A new pump will be somewhat quieter but is it worth the cost and time to replace it? Here is a picture of the
pump. Just click HERE

Posted on Nov 16, 2011

  • 2428 Answers

SOURCE: We have a 2008 GMC Envoy. It started making a high

Its vary likely a bearing noise . Eighter the altenator power steering pump air pump or water pump . Although it could also be the belt tenisinor its a big time ware part . Thats what i would look at first .The water pump would be leaking from the bottom . The altenator would be giveing you battery problems charging . The air pump if you have one would show signs in engine porformance . The power steering pump you may not notcce a porformance issue .Its likely the belt tenisioner

Posted on Apr 28, 2012

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1 Answer

I have a 95 Buick Regal.It makes a noise when running ,but if take the belt off it stops.


it depends what kind of noise, if its a licking noise the pulleys that the belt is being turned by could be bad (belt tensioner pulley ,Idler pulley etc.) if its a squealing sound like a high pitched whistle or like a rubber heal screeching on a tile floor constantly the belt is no good there is fabric on the inside of the belt and when it wears away you will get the chirp or squealing /screeching sound from this. inspection of that belt will tell you look at the grooves if looks like shiny rubber you found it if it doesn't and the fabric is there then a pulley is the problem bad bearing can make the belt slip resulting in the squealing good luck LATER MAN!

Aug 24, 2014 | 1995 Buick Regal

2 Answers

I have a 2003 Jeep Wrangler that has a high pitch SQUEALING sound when I release the accelerator. Any ideas what's causing it or how to fix it?.


I know i have the same problem, and i also noticed than when i open the Hood the whistle just stops, so i figure out it must be some air cycling in or out osmewhere, I found out my air intake connected to throttle body was misplaced a weird gap was left open allowing air to whistle. u might wanna check there

Sep 19, 2012 | 2003 Jeep Wrangler

1 Answer

What would cause whistling noise near pully and belt area noise gets louder with acceleration


The engine serpentine belt may be worn or wet. The belt slips, causing a high pitched squealing or whistle noise. The other possiblility is a bearing beginning to go out on one of your belt driven components

Mar 27, 2012 | 1999 Pontiac Montana

1 Answer

Secondary air pump located on frame under driverside on 2004 Envoy makes a loud hih pitched noise after cold start. Goes away after about 5 seconds. Can this be repaired or does it have to be replaced. ...


The pump is designed to run when engine is cold to clean up the exhaust, they do make a high pitched noise and this is not abnormal in any way. They are very much like a high speed blower dryer in the way they move air. You can't replace parts in them, they are sold as one unit cost about $210.00 US. A new pump will be somewhat quieter but is it worth the cost and time to replace it? Here is a picture of the
pump. Just click HERE

Nov 16, 2011 | 2004 GMC Envoy

1 Answer

At high speeds, I here a high pitched squeal coming from the passenger side dashboard. Its like the wind is reflrcting off something and it makes this annoying sound. Can you help me figure this out.


I'd check the passenger side mirror first, make sure it is tight to the window frame, no gaps. It causes a wind noise or whistle. It could be from the outside of the truck, try to pin point. Does noise go away with either window down? Does noise get louder turning in one direction (wheel bearing)? Does it get worse then seem better (could be tire noise)? Eliminate fan motor, and radio. Does it get worse with vehicle speed or just engine speed?

Jan 27, 2011 | 2004 Ford Explorer

1 Answer

High pitched whistling on startup - madza121


The symptoms sound like a loose fan belt to me. That is normally described as a screech instead of a whistle but everything else matches.

This should not be hard to fix your self. Also a mechanic should be able to do it in 10 minutes including chatting to you.

If it is a fan belt your mechanic will know the sound 4 streets away too :)

For a short term fix and to prove if this really is the problem you can get your self something called "Belt Grip" It is in a spray on can. Follow the instructions on the can and if it fixed the problem you have the cause. Either get someone else to tighten your belt up or figure out how it's done. Basicaly you just loosen an adjusting bolt normally on the alternator and slide it out a little bit on it's track then tighten it up again.

Hope this helps

Aug 16, 2009 | 2008 Saturn Astra

2 Answers

My car is making a whisling sound when started.


hi ,,two things 1- water pump. but most likely check your pulleys they will make that high pitch noise one of them fixing to go bad and what will happen the belt will jam and jump lose and will lose all power ,,cause you have one belt for alt and the water pump mostly its the pulley right under the alt ,,hope this will help ....Joe

Aug 04, 2009 | 1996 BMW 318

3 Answers

High pitch whistling noise in engine compartment of 2005 envoy


There may be a small hole or cut in a vacum line or possibly just loose. Also make sure the air filter box and the big hose to it are secure and clamps etc are tight. Pulleys and belts can make a high pitch sound also.

Mar 22, 2009 | GMC Envoy XL Cars & Trucks

1 Answer

Squealing noise in 2002 Nissan Sentra


Seems like a drive belt problem, to confirm pour some water on belts the noise should go away or may get louder for a second. If either happens the belt or belts needs to be adjusted or replaced. Good Luck, If I fixed ya, leave me a FIX-YA comment thanks

Dec 18, 2008 | 2002 Nissan Sentra

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