code 0446 evac emission wiring, what is it? and where is it?

DTC P0446 Evaporative Emission (EVAP) Vent System Performance

There is no way to check this at home, but could have been caused by a loose fuel fill cap.

hey thanks ricksza i guess i'll have someone check it out. another problem that i have would be the shifter on the floor, when i put it in park and i turn the key to the off position it won't lock the steering wheel and i can't get the key out. and when the truck is off the shifter easily goes in to gear, when before it would lock. what can i do?

The key won't turn to the release position unless it knows that the shifter is all the way in park. There is a cable from the shifter to the ignition lock cylinder. So most likely either the cable is sticking or the shifter isn't going all the way to park.