Is the VMV (Vapor Management Valve) hooked up properly? IIRC this component is on located on the firewall kinda near the EVR (EGR Valve Regulator). I don't have experience with the EVAP monitor, but on my Connie the EGR monitor wasn't complete and the CEL also wasn't lit. I ended up replacing the DPFE sensor, doing a UIM/LIM rebuild, and changing the plugs.
If the P1000 I/M Readiness code doesn't go away you'll probably have to investigate the EVAP components to see if you missed something during the 3L install.
