Chirping noise on cold startup

[Jordan Wells]

I will post a video of mine tomorrow 

Edited February 28, 2025 by Jordan Wells

[Jordan Wells]

On 7/17/2018 at 5:33 PM, mattarmstr said:

This is my first post in this forum so please forgive me if I posted it in the wrong spot.

Any help with this issue would be greatly appreciated.

 

I purchased a used 2014 Silverado in January of this year. It has approx. 90 000 Kms( 55000 Miles), it’s a 5.3 LT 4x4. I absolutely love this truck, but have noticed a noise when starting lately. It usually happens when the truck has been sitting overnight, or at least a few hours.

 

At first I thought it was a belt slipping slightly, but after a month has passed I believe the noise it’s getting worse. As soon as the engine starts to warm up a bit, the noise goes away. Sometimes I’ll notice a little chirping when I accelerate slightly, but after a few mins of warming up or driving it goes away.

 

I’m thinking this has to be something belt related, a tensioner perhaps? Any help or suggestions would be greatly appreciated. Thankyou

 

 

Here is the link to a video I took which may be of help:

 

 

 

Did you ever conclude what this was? Mine is doing the same thing and I changed the belt and tensioner but same noise on cold start and when putting it under load/ accelerating. 
I always had my clapper valve tied up but undid it the other day and it did get worse since which I thought was odd.