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The myGMC mobile app lets you control many of Sierra’s features from your mobile device when you have a paid subscription to GMC Connected Services, including:

  • Access to the phone companion app, which offers select mobile functionality of the available in-vehicle trailering app1 (paid subscription not required) such as:
    • Step-by-step predeparture trailering checklists
    • Trailer Light Sequence Test
  • Locate your vehicle2
  • Remote-start your engine3
  • Check your fuel economy, oil life and tire air pressure (limited trial period included)
  • Send destinations to your vehicle through your smartphone4

1. Device data connection required. Available on select Apple and Android devices. Some features require connected vehicle services trial or plan and working electrical system. Service availability, features and functionality vary by vehicle.
2. Vehicle Locate service is designed to locate OnStar-equipped vehicles, not people. Requires compatible paid service plan after trial period. Services are subject to user terms and limitations and vary by vehicle model. Available in the U.S. only. Visit onstar.com for more details.
3. Requires subscription to Remote Access Plan or Unlimited Access Plan. Services are subject to user terms and limitations and vary by vehicle model. Unlock feature requires automatic locks. Remote start requires GM factory-installed and enabled remote-start system. Visit onstar.com for more details.
4. Requires subscription to Guidance Plan, Unlimited Access Plan, OnStar Safety & Security Plan or Navigation Add-On. Services are subject to user terms and limitations and vary by vehicle model. Visit onstar.com for more details.