Assuming you're asking how long a GMC Acadia will last:
The average car lasts around 15 years or 200,000 miles. However, this is just an average and some cars last much longer while others don't make it as many miles. It really depends on how well you take care of your car and how often you drive it.
The GMC Acadia is a newer model (it was first released in 2007), so it's hard to say exactly how long it will last. However, if you take good care of it and don't drive it too much, it could easily last 15 years or more.