it is for an 87' pontiac fierro but if you know how to do it for any car please tell

to replace speakers in dashboard remove dashboard, if in door remove door panels, if there in the column push up from bottom to pry off

well ur question is vague. well if u have a head unit installed(deck) & there r no speakers in the car already, then what u need to do is run speaker wire from the head unit to where ever u want them placed.for example a head unit will say green is(+) & green white is (-) for front right.get it? if there is already speakers in the car & u want new speakers then just take off the cover from the speaker(wether it be a cover that is screwed on, or clipped on, or a door(in that case u need to revmove the door panel)) & strip the exisisting wire & connect it to the new speakers & put the cover back on