2021 3500 Denali "Service Side Detection System" warning

[Nick Taylor]

Just got this warning on a new-to-us 3500 Denali. This truck lived it's first 2 years in Minnesota, so was exposed to salt, etc. My web searches have found lots of posts about this warning coming from corroded connectors in the assembly for the blind spot detector. The videos I found for pre-2016 models say that the fault connectors are right behind the wheels in the rear fender area. I just looked all around up there in my truck and couldn't find anything that looked similar.

 

Has anyone had this error & fixed it? Something I can do with parts, or is this something I'll have to go to the dealer for?

 

TIA!

[gemarsh]

I think they are in the corners of the bumper now.

[GMCustomerService]

14 hours ago, Nick Taylor said:

Just got this warning on a new-to-us 3500 Denali. This truck lived it's first 2 years in Minnesota, so was exposed to salt, etc. My web searches have found lots of posts about this warning coming from corroded connectors in the assembly for the blind spot detector. The videos I found for pre-2016 models say that the fault connectors are right behind the wheels in the rear fender area. I just looked all around up there in my truck and couldn't find anything that looked similar.

 

Has anyone had this error & fixed it? Something I can do with parts, or is this something I'll have to go to the dealer for?

 

TIA!

This is certainly not what we like to hear, Nick Taylor.  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 having the Service Side Detection System warning. To do so, please send an email to [email protected] with ATTN: Nick Taylor/GM Trucks in the subject line.

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[Dhamilton07]

On 3/17/2024 at 5:25 PM, Nick Taylor said:

Just got this warning on a new-to-us 3500 Denali. This truck lived it's first 2 years in Minnesota, so was exposed to salt, etc. My web searches have found lots of posts about this warning coming from corroded connectors in the assembly for the blind spot detector. The videos I found for pre-2016 models say that the fault connectors are right behind the wheels in the rear fender area. I just looked all around up there in my truck and couldn't find anything that looked similar.

 

Has anyone had this error & fixed it? Something I can do with parts, or is this something I'll have to go to the dealer for?

 

TIA!

 

did you ever figure the issue out?