evap system diagram

I'm looking for a diagram for the Evaporator system on a 2002 Chevy S-10
I keep having a problem with my evap system and looking for a diagram on all the parts.
anyone have any ideas or know where i can get one..
thanks

What engine is in the vehicle? Is the Service Engine Soon, (SES) light on? If so, what Diagnostic Trouble Codes, (DTC's) did you retrieve? If there was more than one DTC, what order were the DTC's retrieved in?

it has the 4.3 vortex and the engine light comes on throwing the High evap pressure .
So far I have replaces the charcoal canister and a nother sensor and a couple other things and it seems to be off now...