I have a 93 ext cab pickup. I would like to put a sub in but have no idea where I could put it, I was thinking about under the fold up seats in the rear? Please share all ideas and experiences

 

Not a whole lot of pics of these setups here, there were a few at one time, but yes it's common to use the cubby under the jump seats for your audio. IIRC it's the driver side that can fit up to a 10" if the shape is right, but a good 8" is going to fit better and I don't really see the point of going big in such a small cab. It's been on my "list" for years now, just never did it. Usually the sub is mounted directly in the "door" of the cubby or make a new door. The seat can be flipped down to hide it.

 

Check out this video from youtube that a guy built for his 1999 Toyota Tacoma extended cab. The exact same box would fit in your truck. This will be my next project to build.

 

I have 4 12's