CEL illuminated but known good code reader shows no DTC stored or pending?

Hi guys. I bought this Chevy Equinox for $600 from a friend who said he was having a hard time getting the EVAP monitor to set so he could get it smogged. I am running into this issue with the CEL on with no DTC being set. I was wondering if I could get a pin out for the PCM connectors to test for power and ground at the correct pins. Also, I would like to hear what you guys think is going on here. Do you think the PCM might need to be re-flashed? The vehicle, for what it is, pulls like a freight train. It has zero drivability issues and runs smoothly with power in all gears. I just can't see the PCM being at fault with how well the vehicle runs. Again, thank you, you guys rock!