AT4X fuel injector issue

[Cameron Lang]

Does anybody have any updates/more insight into this problem? I just got a 2022 Sierra Denali 6.2L in September, it was shuddering from day one. Had to bring it to the dealer twice because they couldn't diagnose the problem, then eventually a month in I got a check engine light. Dealer says it's a failed fuel injector, and truck is sitting at the shop waiting for parts. Has having the injector replaced solved all problems for you guys? Very concerning.

[ExYukon]

Does the 5.3 use the same injectors as the 6.2?

 

The 6.2 has been rather constrained on new builds for some time now.  I'm wondering if the injector shortage is hampering production.  The chevy.com web page for 2023 silverado 1500 shows 474 6.2s out of 20787 trucks: 2.3%.  I bet the demand is higher than that.

[newdude]

36 minutes ago, ExYukon said:

Does the 5.3 use the same injectors as the 6.2?

 

The 6.2 has been rather constrained on new builds for some time now.  I'm wondering if the injector shortage is hampering production.  The chevy.com web page for 2023 silverado 1500 shows 474 6.2s out of 20787 trucks: 2.3%.  I bet the demand is higher than that.

 

 

No, not the same p/n. 

[mydavestrong]

Mine acted up day after I got it home, May 16. Still waiting. Not sure what we can do except wait at this point.

https://testmyspeed.onl/

Edited November 27, 2022 by mydavestrong

[Clay Caudill]

So, mine is about 99 percent gone. I sent emails to GM from an email they sent me after leaving a terrible review on their website. I emailed my dealership and told them this truck was basically a paper weight. Left bad reviews. I took the general manager on a drive and showed him what it did. They kept it for about a day and realized it is something with the fuel management system. They advised me to put the truck in L9 which bypasses the fuel management. It was better. Then about a week later, an update was sent to my truck over the air and I couldn't drive for about an hour when I shut it off. Since then, it's been about 3 times. This happened in September. So after 4 months of hating this truck, I'm back to loving it like day 1. It took 4 trips to dealer and emails and reviews to get through. Along with researching bulletin 20-NA-142 from GM. That gave me more info to force the dealership to try more options. No clue if this will work for you, but good luck. I know the feeling. 

[Bleu]

Same issue with 2023 Suburban. Ran fine for a month and then all the lights went off. Dealer says faulty fuel injector. Part on back order. No estimates at all on how long it could be. From what Im reading I dont have much confidence it will be resolved quickly. If it takes longer than 30 days, has anyone looked into filing a lemon law case, if so how has it went?

Edited January 7, 2023 by Bleu

[Clay Caudill]

My truck started to act up again. I am starting to think I am having a bad injector. I don't get any codes though which is confusing. 

[GMCustomerService]

On 1/8/2023 at 5:14 AM, Clay Caudill said:

My truck started to act up again. I am starting to think I am having a bad injector. I don't get any codes though which is confusing. 

This is certainly not what we like to hear, Clay Caudill.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2022 GMC Sierra AT4. To do so, please send an email to [email protected] with ATTN: Clay Caudill/GM Trucks in the subject line.

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