location of intake manifold and purge solenoid attached to it

i have a 2003 chevy s10 v6 4.3l, my check engine light wont go off even after a new gas cap attempt to reset codes. local auto store says the canister purge solenoid which is attatched to the intake manifold needs to be replaced. im no mechanic by any measure accept for normal maintenance stuff. alli was told was its on the manifold, but above or below level? 1 video i viewed said it was near the starter.