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Where is diagnostic port on 91 olds Cutlass supreme 3.1
1991 OLDSMOBILE CUTLASS
Looking for port to hook scanner to find codes
have the same problem?
Tuesday, December 13th, 2011 AT 2:25 AM
I believe under the dash, to the left of the steering column, by the park brake.
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Tuesday, December 13th, 2011 AT 2:30 AM
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