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Where is the diagnostic port located?
1999 OLDSMOBILE 88
For insurance purpose want to plug in a device into the diagnostic port. Where is that?
have the same problem?
Sunday, December 4th, 2022 AT 8:40 AM
The onboard diagnostic port is located under the steering wheel.
See attached picture for the location reference.
Here is a helpful guide on how to check codes:
Let me know if you have any questions.
Image (Click to enlarge)
Sunday, December 4th, 2022 AT 7:47 PM
to post a reply.
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