Fog lights mysteriously on in mornings.

[Pwee]

Hi y’all,

I have a 2017 Silverado LTZ with stock fog lights. so the past 2 mornings I’ve been going outside and my fog lights were on.
When I engage the Fog light button I hear a audible clicking noise from the engine bay fuse box. I located the fuse and checked it/swapped it. It looked fine but swapped it anyways. 
My question is; where is the fog light relay? The loud clicking and random activation of the fog lights lead me to believe it’s the relay.. but I can’t find it. It’s not labeled in the box.  Any advice will help, thanks