If it's an animated production that's like, finished and doesn't just cut to a storyboard, and you have zero connections you could do a couple of things:
1. Submit it to festivals and have a website attached to it in the credits. Mingle with people after some screenings and have a little business card for the pilot. This will get the eyes of people who are in the industry directly on your work. Dan Harmon discovered Roiland through a film festival. He thought Roiland's weird, crappy animation was hysterical (I think it was the Cosby animation?). Your film can be South Park pilot tier as long as it's done-- no cutting away to uncolored storyboards or anything like that.
And you have to find the right festival venue for it. Some festivals are made perfectly for those [AS] comedies while others are artsier and will reject you hard.
2. Upload it online and build an audience for it. Be open that this is a pilot, IE: Becky Prim. Then potential producers who check it out will immediately know this is a pitch.
Keep in mind it is difficult to do both because a lot of festivals have clauses that you cannot upload the film online until # of time has passed. The festival route can sometimes be stronger because you physically meet people who sat down and watched your thing. If you upload it online, you're just hoping it catches someone's attention.
These aren't the only two things you can do, but it's some of the more effective routes that I'm familiar with. Alternatively, you can get a job in a small-time studio and just befriend the producer there. They often have a lot of contacts even at small studios.