oh god
don't bother...sell it...PLEASE!!!
I have a friend with a Sonoma with the same engine.
http://www.s-series.org
Should be able to help you. Goto their Mesasge Board section or whatever they call it. Search or Register.
But I will throw in some common knowledge.
I believe your truck has a hydrulic clutch...so that needs to be taken care of(don't know how)...you'll need to drop the transmission and remove the clutch, get the clutch plate resurfaced.
But thats general...not specific...the website posted should help that.
Damn...I should've paid attention to my friend cause last time I spoke to him about his truck he just got down replacing his clutch.
But seriously...please sell it
At least get the 4.3 V6