Daytime Running Lights on 2001 Lumina

Yes, the other day I finally figured out how to disable the annoying drl's and the stupid automatic headlight crap. Turns out it was just a matter of pulling one fuse in the passenger door fuse box. Number 33 I believe. I dont know how I overlooked this from the beginning. However, the fuse is marked drl mdl/SEO, daytime running light module/SEO. SEO, whats this? I just decided to pull the fuse and see what else stops working, and replace if needed. So far nothing *noticable* has quit working, but if anyone knows what seo is, please let me know, thanks.

SEO is Special Equipment Option. Basically, police/taxi addons like spotlights, roof lights, rear deck lid lights, flashers, the digital cluster (hence SEO Diode), etc.