[1981chevyc20]

I appoligize you maybe repeating yourself, but where is this wire located? That you said to pop it out. And the detent valve where is it located? I am a shade tree machanic but want to learn more about my truck. Are they located on the drivers side or on the passanger side. If I remember I seen a cable on the drivers side and the vacuum mod. on the passanger side along with two lines and the dipstick. Could a dirty filter be the issue? Please help I am confused and my head is beginning to spend. I want to be able to fix my truck with my hands. I enjoy working on it. But I need the guidance.

Thanks