[SMTXAGGIE]

Hey guys, just got a 2011 silverado extended cab z71 4x4 last week, love the truck an wanting to keep it in as good of shape as possible. Nice upgrade from my old '04 1500 with a V6 and 2wd. Anyways, I noticed yesterday when I had my windows down that there is a whistle like whine when I take off as well as when in reverse. It almost sounds like a turbo winding on a diesel but not near as loud. I had my buddy drive by an reverse while I was outside of it an i had a hard time telling where it was coming from in the vehicle. It does not make this sound when idling in park or when I give it gas in park which would lead to me believe it's not something with the engine but rather the drive/powertrain. Anyone else heard a sound like this? Just something that is normal? I dont notice any poor performance or issues when driving, just a low volume whistle. It doesn't seem to do it once up an going, only when at very low speeds, that or I just can't hear it with the vehicle moving faster. I'd appreciate any help y'all got. Thanks.

By the way I recorded the sound with my phone an will see if I can find out how to post up a soundfile of what I'm talking about.

 

[MauryFrench]

I'm not a mechanic; nor do I play one on TV. But I have a similar whine, and sometimes it gets worse when my power steering fluid is low. Does yours make more/less sound when turning for instance, or if you turn the wheels when sitting still?

Also, and this is a question for the more experienced out there, would the belt tensioner pulley squeal when a load is placed on the engine such as driving instead of just idling or gunning the engine?

 

[SMTXAGGIE]

MauryFrench, I haven't tried it when turning, I noticed it when going in a straight line in both forward and reverse. It seems to be louder in reverse then it is when in drive. Here is a sound file to give a better idea of what I am talking about. Figure its easier to hear it then for me to explain it, you can hear it at the around the 16 and 27 second mark. http://smg.photobucket.com/albums/v...ion=view&current=truckwhistlingsound_0002.mp4

Thanks

 

[mfleetwood]

It may just be because I have a stock sound system in my computer, but I was not able to really hear the sound you are referring to.

 

[SMTXAGGIE]

It honestly may just be me being paranoid about a little whistle on a new truck, haha. I dropped it off at the dealer today to get it checked out by them and to get the first oil change since Im at 500 mi. on it, want to get all that break in junk outa it. I'll let y'all know if they find anything.

 

[GM Customer Service]

Keep me updated in regards to your progress at the dealer. Feel free to send me a private message if you have any questions in the meantime. Thank you.

Tricia, GM Customer Service.

 

[SMTXAGGIE]

Well the dealer called me to pick it back up today. They said they didn't find anything wrong an said the noise would be do to me having the 6spd transmission. I figure their mechanics know the vehicle better than me so I'll take their word for it. Either way atleast I have it on file of me bringing it in for this incase something comes up related to it later on. Thanks again for yalls welcome and replies.

---------- Post added at 04:17 PM ---------- Previous post was at 04:15 PM ----------

Keep me updated in regards to your progress at the dealer. Feel free to send me a private message if you have any questions in the meantime. Thank you. Tricia, GM Customer Service.

I appreciate the reply from a GM customer service rep, just out of curiosity have you heard of something like this before or can you confirm the dealers response of it being due to the 6spd transmission? Thanks

 

[GM Customer Service]

I have not heard of something like this before. It is possible that this is the result of the tranmission as described by the dealer. I would recommend keeping an eye on it and if you feel that it is getting worse or louder take it back to the dealer. Please feel free to contact me directly if you have any further questions or concerns. Thank you.

Tricia, GM Customer Service.