OBD port GMC SIERRA 2021 Owner's Manual
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open bonnet, tire pressure, oil reset, horn, change time, change key battery, mirror controls, deactivate airbag
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air conditioning, tailgate switches, ESP, Rear seat removal, seat adjustment, lights, warning, service interval, brake pads, power steering, interior lights, keyless entry, technical data, navigation system, rear view mirror, fuel reserve, key battery, wheel, battery capacity, radio, Tire replace, onstar
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