2010 GMC Terrain SLE, 2.4 W, FWDFACTORY OEM SERVICE PROCEDURE

Circuit/System Verification

IMPORTANT:
  • It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.
  • It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.
  1. Verify that the horn, lights, and the doors locks on the vehicle operate properly.
  2. Contact the OnStar® Call Center by pressing the blue OnStar® button. Verify with the OnStar® advisor that all of the remote functions (door locks, lights, or horn) work.
    • If unable to connect with the OnStar® call center, refer to Unable to Contact OnStar Call Center .
    • If the remote functions do not operate when requested, replace the K73 telematics communication interface control module.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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