OnStar relies on our wireless service provider partnerships and their cellular networks to provide coverage to our customers. When wireless service providers make adjustments to their networks, some vehicles and areas may be impacted by a loss of service, while others may benefit from expanded service.
There are network limitations, including lack of coverage due to zoning issues with cellular towers, network interference, area population, and gaps in network coverage. There are also external factors, such as vehicle enclosures like parking structures or garages, construction, foliage, terrain, and building obstructions. For more information, please review the Connected Vehicle User Terms on the Terms & Conditions page.
Through our partnership, our wireless carriers are committed to network improvements and constantly monitor and optimize their networks to deliver the best possible wireless service.