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Belt squeal (?) on cold start up on 2024 Chevy 2500HD 6.6L Gasser

gastrohman
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MudMonkey Enthusiast

MudMonkey

Posted
Posted

I am having the same issue with my truck.  It is a 24 2500 with 7k miles and noticed the belt squeal/chirp at around 1000 miles.

 

The first visit they checked the pulleys and didn’t find anything.

 

the dealer has called in for support to the higher ups.

 

The service manager had mentioned they might look into the intake/throttle body for the noise.

 

I asked them if the noise is there with the belt off.  Apparently they didn’t check that out.  If it still makes the noise with the belt off, it might be related to the air intake system.

 

It has been to the dealer twice and they have not come up with a solution.

 

i have a third visit scheduled on the first to replace the driver seat motor and they will investigate further on the squeal.

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MudMonkey
MudMonkey

I am having the same issue with my truck.  It is a 24 2500 with 7k miles and noticed the belt squeal/chirp at around 1000 miles.   The first visit they checked the pulleys and didn’t find an

MudMonkey
MudMonkey

I got a new starter put in today and no joy.  It still has the same noise.  It might be a little bit quieter.   Back to the drawing board.

MudMonkey
MudMonkey

Took the truck in again to the dealer.  They are still at a loss of what it is.   Dealership is going to order an intake and see what that does.  They basically told me they will bust out th

Phillyred New Member

Phillyred

Posted
Posted

I just picked mine up today from the dealership for the exact same issue . They changed the idler pulley and belt but issue still remains . I’m thinking it’s coming from the transmission . Gonna take it back tomorrow and have them keep working it . Very frustrating since this is a brand new truck and this will be the third time back to the dealer for the same issue . First time they said they could not duplicate it . 

UWSkier Enthusiast

UWSkier

Posted
Posted

I don't think it's belt related given it goes away under engine load and at higher RPMs.  I'm thinking it's:
 

Exhaust leak from a flange somewhere

Valvetrain noise

Injector noise

MudMonkey Enthusiast

MudMonkey

Posted
Posted

Mine will go back in on Monday.  The tech did check if the noise was still there with the belt off and it was.

 

Dealership is leaning more towards something with the air flow on the intake is the culprit.

MudMonkey Enthusiast

MudMonkey

Posted
Posted

Dealership says it is the starter and have one ordered to change it out.  Apparently it has been more common on the half tons pickups.

 

I will post an update when the starter gets put in.

Another JR Senior Enthusiast

Another JR

Posted
Posted
55 minutes ago, MudMonkey said:

Dealership says it is the starter and have one ordered to change it out.  Apparently it has been more common on the half tons pickups.

 

I will post an update when the starter gets put in.

Did they say how/why the starter makes the noise?  It should be disengaged from the flywheel and just sitting when the truck is running. 

UWSkier Enthusiast

UWSkier

Posted
Posted (edited)
41 minutes ago, Another JR said:

Did they say how/why the starter makes the noise?  It should be disengaged from the flywheel and just sitting when the truck is running. 

Weird... harmonic vibration in the bendix maybe?  Looking forward to the report back!

 

Tempted to throw mine up on the ramps and put my mechanic's stethoscope on the starter.

Edited by UWSkier
MudMonkey Enthusiast

MudMonkey

Posted
Posted

Mechanic said he listened to the starter with a stethoscope to confirm it.  Maybe it is the same starter as the half tons and has something to do with auto start stop feature?

UWSkier Enthusiast

UWSkier

Posted
Posted
17 hours ago, MudMonkey said:

Mechanic said he listened to the starter with a stethoscope to confirm it.  Maybe it is the same starter as the half tons and has something to do with auto start stop feature?

I noticed yesterday when it was 110f out and my truck was hot, if I'd shut it off, then restart it, it'd only make the noise for a few seconds right after starting... maybe...

  • 5 weeks later...
mrjulian416 Enthusiast

mrjulian416

Posted
Posted
On 7/1/2024 at 6:20 PM, MudMonkey said:

Mechanic said he listened to the starter with a stethoscope to confirm it.  Maybe it is the same starter as the half tons and has something to do with auto start stop feature?

Mudmonkey, did the new starter solve the issue?

Joe97281 Enthusiast

Joe97281

Posted
Posted

Mine squeals on cold startup if i press the brake too hard. If anyone has a cold start noise, but not while driving, try less pressure on the pedal. 

MudMonkey Enthusiast

MudMonkey

Posted
Posted (edited)

I am still waiting on a starter to come in.  Dealership is hoping they can get one by the 12th.

 

they tried finding one from another dealership and apparently no one is letting them go if they have one.

Edited by MudMonkey
Terry Nagy New Member

Terry Nagy

Posted
Posted

I have 2024 6.2L Trailboss making the exact same noise as your video.  Literally identical.  Dealer said they couldnt here it (LOL, I hear it all the time.)  Any solutions I can throw back at them on this?

MudMonkey Enthusiast

MudMonkey

Posted
Posted
6 hours ago, Terry Nagy said:

I have 2024 6.2L Trailboss making the exact same noise as your video.  Literally identical.  Dealer said they couldnt hear it (LOL, I hear it all the time.)  Any solutions I can throw back at them on this?

I can hear the noise every time I give a quick blip of the throttle when it is park.

 

Service department said there is TSB for a starter noise.  I don’t know the TSB number.

  • 3 weeks later...
MudMonkey Enthusiast

MudMonkey

Posted
Posted

I got a new starter put in today and no joy.  It still has the same noise.  It might be a little bit quieter.

 

Back to the drawing board.

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