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Sierra Heavy Duty is designed to integrate ASA Electronics1 iN•Command® Control System with Global Connect and accessed through the myGMC® app.2 The system allows owners to monitor and control a range of smart systems, such as water tank levels, HVAC controls and even power slide-outs, in compatible recreational trailers equipped with the technology.

1.    iN•Command® is provided by ASA Electronics and is designed to operate within 30 feet of the trailer. Works with trailers equipped with iN•Command® Control Systems with Global ConnectTM via Bluetooth® connection.  Control and monitoring functionality varies by trailer manufacturer, model, and installed options. Use of the iN•Command® Controls Systems feature through the myGMC mobile app requires an active service plan. User terms apply. See for details and limitations.
2.    Available on select Apple and Android devices. Service availability, features and functionality are subject to limitations and vary by vehicle, device and the plan in which you are enrolled. Device data connection required. Visit for more details.