4th Gen (GMT K2XX)
Key reference: 13580802
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Diagnostic port location (OBD)
Driver's footwell, under the instrument panel to the left of the steering column. No cover on any trim — the 16-pin DLC connector faces downward and is accessible at knee level without removing any trim panels. Consistent location across all Tahoe trims including LS, LT, LTZ, and Premier.
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