Check out www.bb-elec.com they make many protocol converters and also have a
OBD II Diagnostic scanner for vehicles '96 and up. They also provide some
info on the protocols used by GM, Ford, Chrysler. They don't get into
detail but they list the Standards (i.e. GM uses SAE J1850 VPW.) I believe
the Society of Automotive Engineers writes the standard protocols, at least
in the US.
"Andrew Falanga" > wrote in message
...
> Hi everybody,
>
> I'm hoping that someone here might be able to help. I have a 97 GMC
> Jimmy (S series) and I've got to get looked at because of the service
> engine soon light.
>
> What I'm wondering, is there some place on the Internet (or elsewhere),
> where one can obtain the data structures and protocols used by GMC?
> Better yet would be something that could simply be installed and used,
> but being a programmer I figured that if I could at least get my hands
> on the specs for this stuff I'd probably be able to write the program
> myself.
>
> Can one find these things anywhere?
>
> Andy
>
>
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