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USB Issue - 2021 Sierra 1500


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My USB-C/USB-A port receptacle (13529873) stopped working on my 2021 Sierra 1500.

 

-Fuse wasn’t blown

-Replaced the actual receptacle and that wasn’t the issue

-Tested the F26 fuse with a light and there’s no power making it to the fuse

-Disconnected/Reconnected the battery

-(updated) Tried the K2 relay and it wasn’t the issue

I’ve attached the codes that popped up on the DTC report.


Any suggestions on where to look next?

IMG_2791.jpeg

Edited by MB2021SIERRA
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Welcome to the site!

No power to F26 --> check relay K2.

 

F26 or 'F26DR' in GM speak is powered by relay K2

(in)conveniently mounted on the backside of the fuse block.

 

If you can read a wiring diagram the Body Builder

manual from the GM Upfitter site is your friend.

 

Good luck and let us know what you find out.

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39 minutes ago, rbau said:

Welcome to the site!

No power to F26 --> check relay K2.

 

F26 or 'F26DR' in GM speak is powered by relay K2

(in)conveniently mounted on the backside of the fuse block.

 

If you can read a wiring diagram the Body Builder

manual from the GM Upfitter site is your friend.

 

Good luck and let us know what you find out.


Thanks for the advice. I tried the K2 and it wasn’t the problem. 
 

Any other ideas?

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Attached the wiring diagram for this circuit.

 

Pull relay K2, examine the socket for

a pin that may have backed out.

Test the socket pins using

a test light or multi-meter:

 

with engine off:

-Pin 30 has 12v at all times

-Pin 86 has continuity to ground

 

with engine running:

-Pin 85 has 12v

20_Sierra_1500_Electrical_Body_Buil-pg7-764.pdf

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On 5/5/2023 at 1:53 PM, MB2021SIERRA said:

My USB-C/USB-A port receptacle (13529873) stopped working on my 2021 Sierra 1500.

 

-Fuse wasn’t blown

-Replaced the actual receptacle and that wasn’t the issue

-Tested the F26 fuse with a light and there’s no power making it to the fuse

-Disconnected/Reconnected the battery

-(updated) Tried the K2 relay and it wasn’t the issue

I’ve attached the codes that popped up on the DTC report.


Any suggestions on where to look next?

IMG_2791.jpeg

This is certainly not what we like to hear, MB2021SIERRA.  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 2021 GMC Sierra. To do so, please send an email to [email protected] with ATTN: MB2021SIERRA/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s Privacy Policy, please visit https://www.gm.com/privacy-statement.html. The information you provide may be monitored and recorded and is subject to the GM Privacy Statement.
 
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www.gm.com
 

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