Blinking Check Engine Light

[GMCustomerService]

On 12/13/2022 at 5:01 AM, Amy Swayngim said:

I'm having the same problem on my 2021 5.3, but no codes have been thrown. Onstar, dealership and app shows nothing. Any recommendations as to what it could be?

 

 

 

 

This is certainly not what we like to hear, Amy Swayngim.  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 truck. To do so, please send an email to [email protected] with ATTN: Amy Swayngim/GM Trucks in the subject line.

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