Buick and GMC are the latest GM car brands to announce CarPlay availability for upcoming vehicles, GM has announced. Buick will be bringing CarPlay compatibility to the 2016 LaCrosse and Regal, while GMC’s 2016 Canyon, Sierra, and Yukon will also gain Apple’s CarPlay. Within the last month, GM has also announced CarPlay compatibility for upcoming Cadillac and Chevrolet models. Compared to Apple’s other CarPlay partners, GM appears…