Yesterday, I took my department store full suspension Schwinn out for my first trail ride ever and had a blast. The cheap Schwinn seemed to take the beating relatively well, I liked the full suspension. However, today I discovered that the rear shock is squeaking. Being a compete noob to biking I don't know if there is something that I should lube. I believe the sound is coming from the shock it's self, not a pivoting point somewhere else on the bike. Can somebody help?

This is a full suspension Cheap Schwinn.