Engine Chirping, video included - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 05-02-2019, 10:54 AM
wormwood1978 wormwood1978 is offline
Junior Member
 
2008 Chevy TrailBlazer LS
Purple 4.2L I6 4X4
Join Date: May 2017
Location: Ellsworth, ME
Posts: 7
Engine Chirping, video included

2008 Trailblazer 4.2, 85,000 miles.

I posted this topic on another forum as well, but wanted to get a few more opinions. I noticed this noise about a month ago when idling but also when the gas pedal is slightly touched. The noise is more noticeable on the passenger side. In the video you will hear the chirps at 3-5 seconds and 24-40 seconds. I had my wife rev the engine a couple times during the video.

I just changed the belt, tensioner and idler pulley and that changed nothing on the sound. I switched from a Gates belt replacing with a Dayco, along with a Dayco tensioner and idler pulley. With the vehicle running and belt on I am hearing occasional chirping and even more chirping when in drive and just touching on the accelerator, then chirping seems to disappear when further pressing down on the accelerator. I used a mechanic stethoscope but still canít pinpoint where exactly the chirping is coming from. Car running with no belt, no noise.

The chirping seems to be coming from the passenger side, perhaps near the power steering reservoir. The power steering pulley seems to occasionally be making a slight noise but I canít be sure. Turning the wheel from side to side does not change the chirping and I donít have any loss of power steering fluid. Annually I suck out the power steering fluid and replace.

Original water pump, fan clutch, ac compressor and power steering pump.
Iím guessing my problem might be the power steering pump but that is a guess. Any thoughts on the cause? Also, is this something I should wait to fix, see how it develops, or fix now? Thank you

Video of my problem:
https://www.youtube.com/watch?v=hviEBbgqkJU
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  #2  
Old 05-03-2019, 06:13 PM
falcon8667 falcon8667 is offline
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2005 GMC TrailBlazer LS
Bordeaux Red Metallic 4.2L I6 4X4
Join Date: Jul 2018
Location: usa
Posts: 79
Sounds like water pump to me. Power steering pump will make more humming sound. Don't forget to check the alternator. Take the belt off and spin each pulley by hand and listen to the noise.

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  #3  
Old 05-10-2019, 05:40 AM
wormwood1978 wormwood1978 is offline
Junior Member
 
2008 Chevy TrailBlazer LS
Purple 4.2L I6 4X4
Join Date: May 2017
Location: Ellsworth, ME
Posts: 7
Solution: New muffler.



I was very close to throwing parts at my problem starting with a new power steering pump. My annual state inspection was due and before they would give me a sticker, they wanted a new end link and a new muffler. They said I had holes in my muffler. Anyhow, I did the end link myself and looked closer at the muffler. Yes some rust, yes original and yes it might quiet my vehicle some, but no holes. I had them do the muffler and now no more chirping and my vehicle is quieter. The chirping I was hearing I thought was somewhere near the power steering reservoir or near the exhaust manifold, I guess it was exhaust related.
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