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GMC Terrain OBD port location

One generation, 2018–2024.

2018–2024

3rd generation

Illustration — use it to know where to look.

Location

Driver's footwell, on the underside of the lower dash immediately to the left of the hood-release handle, outboard of the steering column and above the pedal box. The 16-pin connector faces downwards and is fully exposed — nothing to unclip, you can reach it from the driver's seat with the door open. Watch for the smaller flat white 12-pin low-speed serial data connector sitting right next to it; plug into the wider 16-pin trapezoid, not that one. Same position on every trim from SL through SLE, SLT, AT4 and Denali, 2018 through 2024, and this generation was left-hand drive only across North America and the Gulf states.

Also on this Terrain

  • KeysSmart key
  • Tools confirmed11
  • Transponder chipSubscribers
  • Programming procedureSubscribers
Open the full Terrain 3rd generation record

Questions

GMC Terrain OBD questions

3rd generation (2018–2024): Driver's footwell, on the underside of the lower dash immediately to the left of the hood-release handle, outboard of the steering column and above the pedal box.

Other GMCs

Found the port. Now program the key.

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