po 410 code again

Hi
I have a po 410 code on my 2005 envoy 6 cyl
Pump and relay seem to be working and I want to remove the
solenoid/valve to test it and possibly clean or replace it.
I haven't been up on my electrical connections lately.
This is a little embarrassing, but how do you release the connection
at the solenoid/valve near the trans dipstick.
I'm just about ready to cut the wires.
Thanks
Angelo