Thanks Paul,

What I would like to do is to be able to record a part of the data sent in my GM vehicle when, for example, you press window down and be able to repeat that at any time. Such as when I press window down on the driver door, it would also make all the windows go down. This is just an example.

GM uses one data wire running to all modules, when you press passenger window down, it sends data on this wire to the module in the passenger door, this module then activates the window motor. As far as I can determine, the data is called Class II and is sent at approx. 10.4 kbs.

I've hooked my o-scope up to this wire and can see the data sent.

Thank you