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2021 Sierra coming my way and need some info.

rusty503
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rusty503 Enthusiast

rusty503

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I am about to buy a new 2021 Sierra next week. I will be going from NC to Dallas to pick it up and then drive back home. With the issues I have read about the fuse block bolts I want to be able to fix it myself before heading back for 1000 miles. What size are these bolts and do I need a short extension? I would really hate to be stuck in the middle of nowhere.

Transient Senior Enthusiast

Transient

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I'm with Jav_eee on this. What issue are you talking about? A few weeks after picking up my 2020 I moved from southeast Virginia to southwest California. I drove the entire way, and had zero problems.

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O Town Denali Enthusiast

O Town Denali

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It is either a 7mm or 9/32.  I used the 7mm.  No extension needed.  Can't hurt to check them.  Takes 2 minutes.

rusty503 Enthusiast

rusty503

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It is either a 7mm or 9/32.  I used the 7mm.  No extension needed.  Can't hurt to check them.  Takes 2 minutes.
Thanks! I plan on checking that before I leave the lot.
rusty503 Enthusiast

rusty503

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What is the fuse block bolt issue? I have a 19 and I’m not aware of this...

 

 

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There have been numerous posts about the loose bolts in the underhood fuse box causing crank but no start, cel popping up and other warnings. There is even a TSB on it. I just couldn't find the size of the bolts.

 

garagerog Enthusiast

garagerog

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Rusty relax and enjoy your drive home, not only will you be covered by GMC's bumper to bumper warranty, but you will have roadside assistance too, I would be more worried about distracted drivers causing an accident or a stone throw chipping your brand new paint, just stay well back from tractor/trailers on the freeway, especially empty flat-beds that are notorious for flying debris.

Edited by garagerog
Jav_eee Enthusiast

Jav_eee

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There have been numerous posts about the loose bolts in the underhood fuse box causing crank but no start, cel popping up and other warnings. There is even a TSB on it. I just couldn't find the size of the bolts.  


Interesting. This is the first time I’ve heard of it. Guess I’ll check mine for funsies!


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rusty503 Enthusiast

rusty503

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Rusty relax and enjoy your drive home, not only will you be covered by GMC's bumper to bumper warranty, but you will have roadside assistance too, I would be more worried about distracted drivers causing an accident or a stone throw chipping your brand new paint, just stay well back from tractor/trailers on the freeway, especially empty flat-beds that are notorious for flying debris.
I am trying to be proactive not reactive especially hundreds of miles from home in the early morning hours when no dealers are open.
redwngr Senior Enthusiast

redwngr

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Usually, by the time they create a bulletin for something like that they have identified and corrected whatever caused the problem during assembly.

 

So on later built vehicles...

rusty503 Enthusiast

rusty503

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Usually, by the time they create a bulletin for something like that they have identified and corrected whatever caused the problem during assembly.
 
So on later built vehicles...
While I totally agree with you, I don't want to take a chance. Like a saying goes, an ounce of prevention is worth a pound of cure. Better safe than sorry.
Z45 Senior Enthusiast

Z45

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Bulletin says only 19 and 20 models and not 2021, so don't worry about it.  

BigMick2023 Enthusiast

BigMick2023

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8 hours ago, Jav_eee said:

 


Interesting. This is the first time I’ve heard of it. Guess I’ll check mine for funsies!


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Me too.....never heard of it. 

Guess I'll check the bolts on my 2020 RST just in case. 

 

I've been accused of having a few screws loose, but that's another story. ?

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