One problem related to water pump has been reported for the 2011 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 GMC Acadia based on all problems reported for the 2011 Acadia.
The 2011 GMC Acadia vehicle at 38k miles suffered a major leak in the cooling system. Per NHTSA id number 10052213 & pb-13079, the fix did not stop the coolant leakage around the water pump seal. With the vehicle at 38k miles the dealer tested and charged for the replacement of the water pump. This should not have happened with this low mileage. The manufacturers safety issue in my part was unsatisfactory do to the replacement of the defective part not under warrenty.