This adaptor is a modified ELM327 OBDII Adaptor, to work with the GM Slow LAN Can Bus.
http://www.gtosoft.com/?p=81
I know the information on how to make one of these yourself is up on the website page that I linked to,
to be honest, the price that these units sell for, I don't think its worth the time to try and source the parts,
and trying to build one yourself...
Anyway, this thread is to try and work out a couple of things,
1) Work out what the Sat-Nav GM Lan Gateway module sends on the Bus, to enable the Colour LCD VGA Input.
This is the highest priority hack that we are trying to work out at this point in time.
2) Work out what other information the Sat Nav system sends on the BUS (Street Name, Direction Arrows, etc).
This is kind of Meh, as I dont think any aftermarket Sat Nav systems send this information out on a serial port, or any other data port which could be integrated in to the VE models like the Factory Sat Nav units.
However, this could be handy for in car PC stuff ????
3) Work out the Park Assist data (How to enable the Park Assist screen on the Colour LCD Screen).
Again, kind of Meh, as once we have this data, we might be able to do a proper park assist project with an arduino using factory Ultrasonic sensors, or via an in car PC ????
4) Work out anything else that might seem funky at the time.
Maybe some iPod, iPad, iPhone media support ???
Here is the location of the OBDII Connector if anyone is interested..