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2005 GMC Envoy Engine whining

Tiny
MELISSAMOSS
  • MEMBER
  • 2005 GMC ENVOY
  • 150,000 MILES
My 2005 GMC Envoy (SSE with the Vortec straight 6 engine) makes a whining noise when I accelerate. The higher the RPM's get, the higher pitched the whine is (and it gets louder as the RPM's rise). I was told to replace the tensioner pulley. This did solve some of the whining, but it's still there. Any idea what this might be?
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Saturday, July 6th, 2013 AT 5:34 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Could the noise be coming from the power steering pump? If you remove the serp belt, spin and check all accessories to make sure there is no excessive play or noise coming from theme.

Once you have the belt off, start the engine to see if the noise is gone. If it is, you know it is one of the belt driven accessories. NOTE: Only run the engine for a few seconds with the belt off. It will overheat if it is run more than a few seconds. Only run it long enough to see if the noise is gone.
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Saturday, July 6th, 2013 AT 8:00 PM
Tiny
ENVOY07SARA
  • MEMBER
  • 1 POST
I had the same same exact problem! It drove me nuts my husband finally figured it out and fixed it and it sounds like brand new! If I remember correctly it was what's called the serpentine belt. I am going to call him right now to double verify that in case you haven't Fixed it yet. My dealership guy, a very close friebd actually, said that on boys are notorious for this. I will check back in before 3 pm today July 25th.
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Thursday, July 25th, 2013 AT 7:31 AM
Tiny
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Thanks so much for the answers. I will take all this advice. Will wait to hear from Envoy07 Sara, definitely will want to know if it's the serpentine belt. Didn't fix it yet but will be checking it all out this weekend.
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Thursday, July 25th, 2013 AT 10:51 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
I don't know why, but this just showed up in my mail. Sorry it has been so long. Have you had any luck with the issue?
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Saturday, August 10th, 2013 AT 9:37 PM
Tiny
MELISSAMOSS
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No, I haven't had any luck yet. I changed the serpentine belt and also the tesioner pulley. I then got a tensioner assembly to make sure it wasn't just the pulley itself. I am sure its a belt driven accessory but can't seem to locate the culprit. It is driving me nuts so I suppose ill have to take it to a mechanic but I would love to solve the issue here if possible. Any more ideas are appreciated.
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Monday, August 12th, 2013 AT 4:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Have you tried starting the engine with the serp belt off to see if the noise was gone? That way you can confirm it is a belt driven accessory. However, if you do this, only run the engine long enough to hear if the noise is gone. I would say no longer that 30 seconds.

Let me know what you find.
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Monday, August 12th, 2013 AT 8:52 PM

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