General Motors announced Monday the pricing structure for its long-awaited in-vehicle 4G LTE service, coming next month.

The service will launch with a three month or three gigabyte trial period, whichever comes first. After that, existing OnStar subscribers will be able to use 200 megabytes of data for an extra $5 more per month, enough to stream more than 6.5 hours of music according to AT&T’s data usage calculator. Onstar costs between $200 a year and $300 a year, The Wall Street Journal reports. Non-subscribers will receive the 200 megabyte package for $10 per month.

Customers who want more data will be able to use up to 5 gigabytes worth for $50 per month. Alternatively, customers will be able to make one-time purchases of 250 megabytes for $5 or 10 gigabytes for $200.

The automobile industry’s broadest deployment of 4G LTE connectivity technology to date, the rollout will begin with the 2015 Chevrolet Malibu in June, and be followed by more than 30 other Chevrolet, Buick, GMC and Cadillac vehicles by the end of the year.

“Chevrolet, Buick, GMC and Cadillac will be the first vehicle brands to market with 4G LTE connectivity offered on such a broad scale,” said OnStar President Mary Chan in a news release. “Later this year, we will begin to offer data plans and our customers will be able to connect for as little as $5 per month.”

GM’s LTE service will feature a built-in Wi-Fi hotspot capable of pairing up to seven devices, as well as improved access to existing OnStar safety and security services.

“OnStar with 4G LTE is embedded into the vehicle, meaning customers get simple connectivity for not only a Wi-Fi hotspot, but also improved access to traditional OnStar services like vehicle diagnostics, remote vehicle access, and others,” said Chan. “Our customers will also have easy-to-understand data plans to let them tailor a connected car experience around each owner’s lifestyle.”