Changes to the Acadia for 2013 amount to little more than modifications intended to increase comfort and handling. On the safety side, the airbag located between the driver and front passenger ranks as an industry first while the backup camera is now standard. Power still comes from a 3.6l V6 with a sixspeed automatic. The top of the line Denali comes with standard all-wheel drive whereas it is optional on the rest of the front-wheel drive range.