What transmission goes into a 1000 silverado with v6 motor

vin number is 1gcec14w9pz178349 model c15903 and which transmission fliud goes in it

Well I only looked for a moment, I didn't find which fluid it takes (you should definitely ask a local mechanic, I did find this link that walks you through replacing it, so I hope this helps.
http://www.ehow.com/how_4519915_change-automatic-transmission-fluid-chevy.html