This is a white-faced, blue and black screen AeroForce Interceptor PT101 (V2.6) OBDII scan gauge for 96-07 GM vehicles (or Fieros with 96-07 3800SC engines!). $250 new, looking for $100 + shipping..
This was 'installed' in the 3000GT dashboard on my 3800SCII Auto car some years back.. (really it was just living in one of the 3 gauge holes in the dashboard, I never made a proper mount for it because I was going to integrate it into the speedometer faceplate..)
Worked when removed from the car, but I have only non-GM CAN bus vehicles now so I can't thoroughly test it beside just powering it on and seeing the splash screens (it seems to go to sleep if there's no OBDII data). Definitely no reason it shouldn't fully work..
I did un-crimp the faceplate retaining ring, as I mentioned I was going to take it apart and mount the display / buttons inside my speedometer faceplate. I sold that car and removed the 3000GT interior, so it never materialized. I can re-crimp the ring, or leave it loose so you can modify it if you'd like. (change the white faceplate to something else, install it in a non-round opening, whatever...) Also the mounting bar on the back has had it's 'wings' shortened. It's a simple bent aluminum piece with 2 holes in it, so it can be easily re-made if it's too short.
Here's a link to the manufacturer's page for the current gauge -
http://aeroforcetech.com/products_interceptor.html Not all versions support all the possible readouts - only what the PCM can send to the gauge..

(Didn't notice the dust until I edited the picture... Whoops)
