Andrew Falanga wrote:
>
> 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?

I would wager that is an ODB-II system. Most auto parts stores will
pull the codes for you for no charge. Or pick up a code reader for
yourself. Or search the net with your favorite search engine and you'll
likely get lots of hits on the subject.

--
Roger