GMC is strengthening its 2020 truck and SUV lineup with premium, bold styling and smarter technologies. GMC raises the bar by adding standard safety features to Terrain and offering the first-ever AT4 Acadia. Acadia joins Sierra 1500 and Sierra Heavy Duty as the newest addition to the AT4 sub-brand, which will be available across the entire GMC lineup in the next two years. The successful rollout of GMC’s next generation pickups continues with the addition of innovative features to the Sierra 1500 and the launch of an all-new Sierra Heavy Duty.