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Stop Sale Sierra and Silverado

Phantom 4D
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Phantom 4D Enthusiast

Phantom 4D

Posted
Posted

Just read where GM has put a stop sale on 2024 Sierras and Silverados. Problem with roof splitting on the passenger side. Can't see it because trim is in the way.

Fix is stop drill, TIG weld coat the weld, repaint and recoat. Trucks on the road will be recalled. 

 

 

 

 

 

 

Merrill Broad New Member

Merrill Broad

Posted
Posted (edited)

There is something I don't understand. Wouldn't the driver side be put together the same way and be affected the same as the passenger side? And OMG I've got to change that profile pic.

Edited by Merrill Broad
BigMick2023 Enthusiast

BigMick2023

Posted
Posted

Ouch......brand new $70K truck with a patch job on the roof. 

Nice!

 

So why is this happening? 

Why just the passenger side?

Who says drilling at each end of the crack will stop a new crack from forming?

 

newdude Senior Enthusiast

newdude

Posted
Posted
25 minutes ago, BigMick2023 said:

 

So why is this happening? 

Why just the passenger side?

Who says drilling at each end of the crack will stop a new crack from forming?

 

 

 

No idea.  Being its a small window of trucks affected, it sounds like its a product defect in the roof panel or something that put stress on that side during assembly (body welding jig was off?) while the roof was spot welded in place.  There are 20-25 spot welds in various locations on the door sides of the roof panel, and about 28-30 at the front and rear each.  The split however appears to not be at those, rather, where the metal is stamped downards.    

 

As for drilling, that is normal in stopping stress cracks.  You drill either end of the crack to relieve the stress points for the rest of the panel.  Its referred to as "stop drilling" a crack.  It rounds out the end point of the crack, which blunts the crack and reduces the stress.  

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BigMick2023 Enthusiast

BigMick2023

Posted
Posted
16 hours ago, newdude said:

 

 

No idea.  Being its a small window of trucks affected, it sounds like its a product defect in the roof panel or something that put stress on that side during assembly (body welding jig was off?) while the roof was spot welded in place.  There are 20-25 spot welds in various locations on the door sides of the roof panel, and about 28-30 at the front and rear each.  The split however appears to not be at those, rather, where the metal is stamped downards.    

 

As for drilling, that is normal in stopping stress cracks.  You drill either end of the crack to relieve the stress points for the rest of the panel.  Its referred to as "stop drilling" a crack.  It rounds out the end point of the crack, which blunts the crack and reduces the stress.  

Thanks for your information.......just seems weird and can't say I would want this done to my new expensive truck. 

 

Glad my 2023 is not part of this issue.......mine has been absolutely flawless so far. 

Love it....

64BAwagon Senior Enthusiast

64BAwagon

Posted
Posted

If it got this far you know it had to be bad.  3000 trucks would only be a few days production so they likely caught the defect at some point and then waited to see if warranty work showed up. 

FreakBeast Enthusiast

FreakBeast

Posted
Posted

The picture from the link @BuckWallace provided looks to me like a material thinning issue during the stamping process. The drip rails in that area have pretty tight radii in the corners, if the factory received material not to spec, this process was designed maybe a little too close to the splitting of the material (or not accounting for material thinning during cab stress tests), or if someone at the factory on the press just thought "hey imma know better than dem stooopid enganeers" and changed the process set points without validating the impacts on the end panel this for sure could happen.

 

I hope it's not on my new HD! lol

Phantom 4D Enthusiast

Phantom 4D

Posted
  • Author
Posted
On 12/15/2023 at 3:34 PM, newdude said:

 

 

No idea.  Being its a small window of trucks affected, it sounds like its a product defect in the roof panel or something that put stress on that side during assembly (body welding jig was off?) while the roof was spot welded in place.  There are 20-25 spot welds in various locations on the door sides of the roof panel, and about 28-30 at the front and rear each.  The split however appears to not be at those, rather, where the metal is stamped downards.    

 

As for drilling, that is normal in stopping stress cracks.  You drill either end of the crack to relieve the stress points for the rest of the panel.  Its referred to as "stop drilling" a crack.  It rounds out the end point of the crack, which blunts the crack and reduces the stress.  

We used stop drill on aircraft too. As long as it wasn't a critical component. 

rjgvt Enthusiast

rjgvt

Posted
Posted

Concerned about this issue. My AT4 HD was built in early December waiting for rail delivery. Already cleaned out my current truck and had the cap removed at the ARE dealer. Truck is stripped to what it was when I first bought it. New cap is already on order. 

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