One problem related to gas recirculation valve (egr valve) 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.
Driving vehicle, temp gage got over 240 degrees stopped and found water pouring out of from the front of the engine. After further inspection found the water pump to be leaking badly.