How do you take out interior speakers 1994 3000gt?

If you are talking about the front speakers, then start by removing the door panels. There are two screws on the rear edge of the door panel. There is a screw behind door handle and one in the vent of the door. Two screws on the front edge of the door panel and four screws (three of which are hidden behind the carpet) on the lower portion of the panel. Lift panel up off the door. There are two electrical plugs (door light and power window/door locks) that you have to unplug.

Set door panel aside. Four screws for the speakers. If aftermarket speakers are being used, then you need to drill four new holes for the screws to hold new speaker in. Also, you will have to cut the speaker plug and rewire with connectors to adapt to new speakers.

Re attach door panel in reverse as you removed.