2021 at4 carbon pro

Another carbon pro diesel in the ranks. Good to read and welcome.
 
I would like to add, I have no idea your mechanical skills or tool inventory, but there is a tsb for the 19 and also update for the 19-20 year models. I did not have an issue, but pro actively, I checked my 21, in Dec. They were loose, I got 3 turns out of them. I have a funny feeling the 21's will be added. I have a hunch that these trucks are built in climate controlled plants and when these hit the streets and see cold weather the bolts become loose from contractions.

I don't know if a dealer will just do it, if you ask, without a issue. Might not be an issue for thousands of trucks, but I didn't want to be stranded with a no crank issue.
 

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Great to know thanks, was a cadillac/ Gm tech for 8 years back in 2003 since then got into machinest position.
 
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