2020 Denali HD trailer lights all work except for trailer running lights?

[BG63]

I ran the trailer app test all lights work, except for the trailer running lights?? Wtf

[kf9yr]

Check the fuse. This happened to me...

I can’t recall right now but I had to change a fuse under the hood in the panel near the driver’s side battery.

It was the one for the trailer module that had blown for me so the electric brakes worked, turn signals and brakes worked but just the running lights did not.

I can’t remember exactly what the labeling was for that fuse and I don’t have my truck at work today but post again if you can’t find it and I’ll look it up.


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[maynard9089]

Not sure if this is what you are experiencing:

https://www.carcomplaints.com/Chevrolet/Silverado_2500/2020/tsbs/tsb-pie0584.shtml

[Njmurvin]

Are your running lights not working at all or just during the APP test?

 

On the 7 pin connector, the tail lights and running lights are on the same pin. Are your tail lights working and running lights not working?

 

Does your trailer have LED running lights?  There have been reported issues with some trailers with LED lights.

Edited December 5, 2020 by Njmurvin