Quick answer

Place the weak fob in the left cupholder, press the brake in Park or Neutral, and press ENGINE START/STOP.

Before you start

Check that your vehicle has it.

Availability

Verified in the official 2025 Terrain guide; the left cupholder is the model-specific backup detection point.

Compatibility check

Does the documented scope match your car?

This check combines the verified year, any source-supported powertrain scope, source-named trim/package and required equipment. It does not read a VIN or factory build record.

Can you see the required control, menu or equipment on your vehicle?
Published availability and qualifications

Verified in the official 2025 Terrain guide; the left cupholder is the model-specific backup detection point.

  • 2025 Terrain gasoline models with push-button start
Visual orientation

Know what kind of control to look for.

This original category diagram is an orientation aid, not a picture of your exact trim. Use the written labels and your vehicle manual to identify the real control.

Key fob and access orientation diagram for GMC Terrain
Key fob and access orientationOriginal visual guide · controls vary by trim · not to scale
How to use it

Step by step.

  1. 01

    Shift the Terrain to Park or Neutral and place the weak key fob in the left cupholder.

  2. 02

    Press and hold the brake pedal.

  3. 03

    Press ENGINE START/STOP and check that its indicator turns green and the engine starts.

  4. 04

    Replace the fob battery promptly after using the backup location.

!

Important limits

  • The key fob must already be programmed to the Terrain.
  • Backup transmitter locations differ among GM models, so use the left cupholder for this exact model-year.
If it does not work

Quick checks.

  • ✓If no key is detected, clear other keys, phones and metal items from the cupholder and reposition the fob.
  • ✓If a second programmed fob also fails there, follow the owner manual's service guidance or contact a GMC dealer.
Owner feedback

What happened on your vehicle?

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Primary evidence

Getting to Know Your 2025 GMC Terrain - Keyless Push-Button Start

Relevant section or page: 5. We use the written official source to determine the steps and applicability shown above.

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Editorial record

Reviewed with a visible trail.

Scope and steps were checked by Car Cheat Codes Editorial Review. A guide is narrowed or corrected when the source does not support a broader claim.

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Guide change history
  • Initial verified publication.
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