Maybe the relay has something to do with the interior lights coming on momentarily when headlamps come on?
Is the relay before or after the fuse?

 

Great news it's fixed! Who'd have thunked that one.

 

Yep. Glad it was something simple.

I think we all got thrown off on our guesses by the 1st post. The fact that the lights would come , if only for a few seconds, made me think that the fuses must have been good.
BUT............Always willing to learn something new.
Thanks for the update.

 

The relay is after the fuse. I can't see a connection to the dashboard except maybe on the GMLAN.

 

Same problem, fuse 69, never would have thought.

 

Now you can see paradise? By the dashboard lights?

 

It is better than a big rubber fist boinging you in the face to tell you your tail lights are out.