2012 GMC Acadia: What is the tire size and pressure, and wheel size?

The 2012 GMC Acadia base tire size is P255/65R18, and the rims are 18 inches. The tire pressure recommended iS35 PSI. As a precautionary measure, always double-check what PSI Your tires should be before adding any air. You will always find this information on the sidewall of every tire. If You overfill, You run the risk of popping the tire while driving, or just decreasing the traction. It will also cause the tire tread to wear out a lot more quickly down the center of the tread - all of which can lead to dangerous situations. To keep Your tires healthy, You should have them rotated every 7,500 miles. Youll pay about $35 to $45 dollars for this service.