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Where is the OBD-ll DLC on a 1995 Chevrolet Lumina with 3.8L engine?

The OBD-II DLC (Data Link Connector) wasn't standardized until the 1996 model year. A 1995 Chevrolet Lumina, even with a 3.8L engine, will have an OBD-I connector, not OBD-II. Therefore, you won't find a standard OBD-II port.

To access the diagnostic connector on your 1995 Lumina, you'll need to consult your owner's manual or a repair manual specific to that year and model. The location varies by vehicle, and it's typically under the dash, but not in the standardized OBD-II location. You'll likely need an OBD-I scanner to read the codes.