Curious if anyone has ever run across/done a design (HW/FW) for a PIC-based
OBD II for GM vehicles (uses the J1850 standard)?

I've been using PIC16F87x for several years.  Probably is overkill for this
project, but have some pcbs which probably could be used to prototype such a
design.  Save doing a pcb for it.  To start it would probably display on a 4
line x 20 char LCD.

Any ideas, suggestions, etc. would be greatly appreciated.

Harley
ps - this is mainly as a learning experience 
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