Wine sound from under truck idling in park

[15 Z71]

Hopefully some one can help me. I have a 2015 gmc sierra 1500. And for some reason after it's warm and I start it or after I have drove it, it makes a weird wine sound on and off in park idling. As soon as I put it in drive it stops or just barely push on the gas pedal barely bring up rpms it quits. Transmission is not slipping and shifts fine. 

[M1ck3y]

The sound is from under the truck, or under the hood?

[15 Z71]

4 minutes ago, M1ck3y said:

The sound is from under the truck, or under the hood?

I believe under. Seems like it does it after it's been driven awhile. Or it's hot. 

[M1ck3y]

Anybody's guess then, could be anything.

[Earl Cordova]

On 11/16/2021 at 4:15 PM, 15 Z71 said:

Wine sound from under truck idling in park

Does it sound like Red or white whine ?

Edited November 21, 2021 by Earl Cordova

[OffTheAir]

Hey 15 Z71,

This information won't be of much help unfortunately, but I have a 2014 Sierra and I was facing a similar scenario as you. It was similar to a whine, but I likened it more to an intermediate whirring or purring noise, and I was getting it ONLY when the truck was idling in park after I had driven it for a bit. The noise was loudest around the passenger side front of the truck. I didn't even bother taking it in because I could never replicate the sound when I wanted to, but it doesn't seem like it impacted the truck in any way.

As of a couple weeks ago, the noise has since stopped completely (whether that has something to do with the cold weather here in MI, I am not sure) and I can't replicate it at all. If it ever comes back, I will try and get a sound clip and post it here, but as far as under the hood, I could not find any issues. Sorry I can't be of more help!

If there is any updates about the issue, please let us know!

 

[15 Z71]

23 hours ago, OffTheAir said:

Hey 15 Z71,

This information won't be of much help unfortunately, but I have a 2014 Sierra and I was facing a similar scenario as you. It was similar to a whine, but I likened it more to an intermediate whirring or purring noise, and I was getting it ONLY when the truck was idling in park after I had driven it for a bit. The noise was loudest around the passenger side front of the truck. I didn't even bother taking it in because I could never replicate the sound when I wanted to, but it doesn't seem like it impacted the truck in any way.

As of a couple weeks ago, the noise has since stopped completely (whether that has something to do with the cold weather here in MI, I am not sure) and I can't replicate it at all. If it ever comes back, I will try and get a sound clip and post it here, but as far as under the hood, I could not find any issues. Sorry I can't be of more help!

If there is any updates about the issue, please let us know!

 

Thanks for your response. Hopefully it's nothing. 

[pokismoki]

either fuel pump or transmission pump