Question about 2004 Chevrolet TrailBlazer

1 Answer

High pitch winding noise on cold start up.

On start up, there is a high pitched winding noise for about 30 seconds and then the winding sound startes coming back down as if it was a turbo. If you turn the engine off before the 30 seconds is up the high pitched winding noise continues to come back down even after the engine is turned off. It sounds like something up then back down after 30 seconds it is gone. After the engine is warmed up the noise can't be heard anymore even if you shut the engine off and start it back up.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 766 Answers

Sounds like a constricted IAC Idle air control valve passsage. Fairly simple to fix. Remove air filter trunking all the way to the throttle body to allow access. The IAC allows air passed the throttle when closed at idle. Just on the inside of the throttle body in front of the throttle flap there is an opening in the throttle wall. This is the air inlet to the IAC; there is an outlet similar on the other side of the throttle. Use carb cleaner and cloth to shift the grime from this tubing and get it like new. Hold the throttle flap open to get at both ends of the IAC tubing. The IAC can be detached and cleaned to a shine. Reinstall the IAC and replace all air pipe ducting. Leave for about 20 minutes to allow any cleaner residue to dry out. When you restart you might experience a bit of uneven running but this will disappear very quickly as the last of the cleaner dries out

Posted on May 04, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

High pitch noise when decelerating


jack vehicle up and rotate one wheel at a time to see if noise is present, let me know what you find

Dec 18, 2015 | 2002 Toyota Corolla

1 Answer

2010 Elantra, started with a high pitched sound turning left. Did that for a few days, then started when turning right. Now same noise is cooming for about 10 seconds. Not immediately on start up but


You may need to check the belts on your car's power steering section. Make sure the belts are tight and not worn out. Check for cracks on the belt and if loose, tighten it. There is also a product called Automotive belt dressing that you can spray on the belt to make it stick more easily to the pulley it is supposed to turn.

Mar 12, 2014 | 2010 Hyundai Elantra

1 Answer

Engie high pitch noises


The most common cause for the noise is a slipping belt.
Either the belt is worn and stretched, or glazed.
If the belt tensioner is keeping the belt tight, you may need to replace the belt.

Feb 08, 2013 | 2005 Toyota Tundra

1 Answer

Metal on metal sounding clicking noise while the wheels are turning but only on the frot driver and passenger wheels. What is going on? It started out only on the passenger side and then after the tire...


Is the noise a screeching high pitch or a growling low pitch?
It sounds to me that the CV joints might be bad and you need brakes.
high pitch would be the brake warning tabs
the low pitch would be the brake pads are gone and you are on the rotors gringing away metal

May 21, 2010 | 2000 Nissan Altima

1 Answer

Have 93 Chevy G 30 Have a High pitch whine that changes with rpm


This could be anything from the pump in the transmission to the alternator bearings/bushings to the power steering pump. Could be an idler pulley bearing, but I doubt it.
Hint: If the noise is very high-pitched, check the alternator. If it is a lower, medium-high-pitch sound that changes some when you turn the wheels, check the power steering pump. If it is almost like a moan or a "Whooo" sound, that's the transmission pump.

Feb 23, 2010 | 1994 Chevrolet Sportvan G30

1 Answer

2000 Beetle Loud Whirring at start up


its your secondary air pump. it turns on in the cold morning to inject more air into your exhaust, something about emission. its normal to be high pitched. once on my car it was way loud, i looked and the hose had disconnected. either way its normal if its not super loud. but if its everyone is looking at me loud then check for loose hoses!

Apr 03, 2009 | 2000 Volkswagen Beetle

1 Answer

1999 Honda Passport 4x4 auto intermitent high pitch winding noise


try checking the tension on all the belts(fan/water pump, power steering, alternator). If loose, they'll whine.

Feb 26, 2009 | 1999 Honda Passport

1 Answer

High pitched car sounds


does the noise and light occour at the same time ? another cause of a high pitched noise can be slipping drive belts, alternator,powersteering etc so check them for tightness, condition etc, does the noise happen when car staionary and just rev the engine ? if so i would say it is the drive belt/s, go back to the VW dealer re the ABS light and get them to check the OBD as should be done as part of the service , hope this helps

Mar 29, 2017 | 2001 Volkswagen Jetta TDI

1 Answer

High Pitched noise


I had a high pitch noise, didn't sound like it came from the "underside". Turns out it was one of fans that had little chips in the blades? My Audi dealer replaced it, and it's fine now.

Jul 28, 2008 | 2002 Audi A4

Not finding what you are looking for?
2004 Chevrolet TrailBlazer Logo

1,043 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8140 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...