GMC Sierra Quiz
OnStar

Unable to Connect to OnStar Message

In this manual: OnStar
Introduction — 6In Brief — 46Seats and Restraints — 48Storage — 7Instruments and Controls — 75Lighting — 22Infotainment System — 22Climate Controls — 7Driving and Operating — 77Vehicle Care — 79Service and Maintenance — 26Technical Data — 8Customer Information — 25OnStar — 25Keys, Doors, and Windows — 38
~1min read

If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push GMS Sierra: Unable to Connect to OnStar Message. Vehicle and Power Issues to try the call again or try again after driving a few miles into another cellular area.

Test yourself

A quick GMC Sierra quiz: every answer comes with an explanation and a link to the manual page.