Hello,
I learned how to get into my Diagnostics System.
I own a 1996 Seville STS.
To get in, I press "OFF" and "Passenger Air" "Up".
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How do I select codes and make changes?

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If you know of any cool things to do while
in the Diagnostic mode, it would be good to know.

I can't get rid of this old emissions code.
The Service Engine light is annoying me.

I'd appreciate any help.
Thanks in advance,
Chris

you and about everyone here on the forum knows how to do this... its nothing new by any means...

and if you have a code and you cant clear it then it must still detect a problem

I just found tons of resources that tell how to use the onboard system.
Cool.

i know how to hack the dic to:
display the actual coolant temp and actual mph on the dic
and to turn off the drls completely