One problem related to alternator/generator/regulator has been reported for the 2008 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 GMC Acadia based on all problems reported for the 2008 Acadia.
Bought this vehicle used, was fine and was a great car for months until the battery would not keep a charge. Took it to auto zone they tested my battery and alternator all was good they charged up my battery for me. The battery lasted two days next time I went to start it it was dead. Would have to drive it every day to keep a charge on it. Eventually went and bought a brand new battery. Only after a few days the battery was dead again. On a brand new battery it would need to be drove everyday to keep a charge. It's to the point where I will have to jump it to drive it and then it wont even keep a charge for a hour. Brand new battery. Nothing wrong with the alternator. No lights , etc. Being left on. Not sure what to do with it. Need my car.